The area of a triangle is 20 cm², and the
altitude is 4 cm greater than the base. Find
the length of the base, to the nearest
millimetre

The Area Of A Triangle Is 20 Cm, And Thealtitude Is 4 Cm Greater Than The Base. Findthe Length Of The

Answers

Answer 1

Answer:

Heavenly,  we need the forumula for the area of a triangle, do you know it?

Step-by-step explanation:

Area of a triangle is (1/2 ) * B*H

where B = base

H = height

then

A = 1/2* B * H

A is given to be 20

B = b

H = b+4

plug all those into the formula,

20 = (1/2)*b*(b+4)

use your algebra skillz  :P

20 = 1/2 *( [tex]b^{2}[/tex] + 4b)

20*2 = [tex]b^{2}[/tex] + 4b

40 = [tex]b^{2}[/tex] + 4b

0 = [tex]b^{2}[/tex] + 4b-40

rewrite the above so it's in x format

[tex]x^{2}[/tex] + 4x -40 = 0

use the quadratic formula to find  x  , and for our problem, remember that x represents the base,  or b,  but don't mix it up with the b in the quadatic fomula,  with the b of the triangle, which is the base,  they are differnt "b"s   :P

X = (b±[tex]\sqrt{b^{2}-4*a*c }[/tex] ) / 2*a

a = 1

b = 4

c = -40

x = (4±[tex]\sqrt{4^{2}-4*1*(-40) }[/tex]  ) /2*1

x = ( 4±[tex]\sqrt{16+160}[/tex] ) / 2

x = (4±[tex]\sqrt{176}[/tex] ) / 2

x = (4±13.266499)/2

x= 2±6.633249

x = 2 + 6.633249 = 8.633

b= 8.633 cm


Related Questions

Will award brainliest for the correct answer!

Answers

Answer:

2^4ab

Step-by-step explanation:

By factorizing 48ab^2 I get 2*2*2*2*3*a*b*b

By factorizing 32a^2b I get 2*2*2*2*2*a*a*b

All the factors that these have in common is 4 2's, one a, and one b, which is 2^4*ab, or 16ab.

Drag each set of coordinates to the correct location on the table. Calculate the distance between the pairs of coordinates, and classify them according to the distance between them. (3, 4) and (2, 1) (3, 7) and (5, 2) (5, -2) and (3, 3) (-2, 3) and (1, 2) (-4, -2) and (-3, 1) (4, -1) and (-1, 1)

Answers

Answer: i need time to work on this but i think its 3,3

Step-by-step explanation:

Answer:

Square Root of 10: (3, 4) and (2,1)

(-4,-2) and (-3, 1)  (-2, 3) and (1,2)

Square Root of 29: (3,7) and (5,2)

(5, -2) and (3,3)  (4,-1) and (-1,1)

which expression is equivalent to 5(x+7)?

Answers

Answer:

5x +35

Step-by-step explanation:

you woul use the distrubitive property

so multiply  by x and and 7

so it becomes 5x +35

Please helpppppp and noooo linkssss

Find the value of x.​

Answers

Answer:

x is 25˚

Step-by-step explanation:

Opposite angles are equal[tex]5x+7=132[/tex]Subtract 7 from both sides[tex]5x=125[/tex]Divide both sides by 5[tex]x=25[/tex]

Answer:

25 = x

Step-by-step explanation:

Since both angles are vertical angles, they are eqaul to each other and hence we can conclude that;

132° = (5x + 7)°

132 - 7 = 5x

125 = 5x

125/5 = x

25 = x

Hope this helps!

What is the base of a parallelogram with an area of 36 square centimeters, if its height is 3 centimeters?

15 cm
33 cm
9 cm
12 cm
PLS HELP ASAP

Answers

Answer:

12 cm

Step-by-step explanation:

Formula_____________

Area of a parallelogram = base × height

==================================

Area of the parallelogram = base × height

36 = base × 3

base = 36/3

        = 12

The function f is defined by f(x) = x^2 + 3x -10 , if f(x + 5) = x^2 + kx + 30, k=

Answers

Answer:

k = 13

Step-by-step explanation:

substitute x = x + 5 into f(x) , that is

f(x + 5) = (x + 5)² + 3(x + 5) - 10 ← expand squared factor using FOIL

          = x² + 10x + 25 + 3x + 15 - 10

         = x² + 13x + 30

compare this with f(x + 5) = x² + kx + 30

for the 2 expressions to be equal , then k = 13

BRAINLIEST! and MAX POINTS! PLUS 200 POINTS FOR A GOOD JOB!!
Given the following numbers:

π,2√5,√8,√3,√27

part A. Approximate the square root terms using the perfect squares approximation method. Your answer should be a mixed fraction. Make sure to show your work.

Please note pi does not need to be approximated by the perfect squares approximation method as it is not a square root.

part B. Order the numbers from least to greatest. Please show your answer using the original symbols and radicals provided. You may use decimals or fractions as part of your work for figuring it out.

Answers

Answer:

Part A)

0.47/1=0.47x100/1x100=47/100\

Part B)

0.47=47/99

Part C)

0.47=47/99

-------------------------------------------------------------------------------------------------------------

this is what I got for the first problem

Part A, 2√5)

5=2.2360679775 5=2x2.2360679775=4.472135955=4.47

Part A, √8)

2 3

V4 8 v9

2 4/5

Part A, √3)

1 2

V1 3 v4

1 2/3 Part A, √27)

5 6

V25 27 v39

5 2/14

-------------------------------------------------------------------------------------------------------------

Part B)

1 2/3 2 3/5 4.47 5 2/14

and this is what I got for the second problem

Step-by-step explanation:

Hope tis helps

A dog is leashed to a point in the center of a large yard. If the leash is 18.8 feet long, what is the total area of the region the dog is able to explore? Round to the nearest tenth.

Worth 25 points!! pls hurry I have a test

Answers

Answer:

1109.8 square feet

Step-by-step explanation:

In this case, assume the leash to be the radius of the circular yard.

Area

πr²3.14 x (18.8)²3.14 x 353.441109.8 square feet

Consider this quadratic equation. 2x2 − 1 = 3x + 4 Which equation correctly applies the quadratic formula?

Answers

Answer:

[tex]\frac{-(-3)+-\sqrt{(-3)^2-4(2)(-5)}}{2(2)}[/tex]

Step-by-step explanation:

Quadratic formula: [tex]\frac{-b+-\sqrt{b^2-4ac} }{2a}[/tex]

[tex]2x^2-1=3x+4\\\\2x^2-3x-5=0\\\\\\frac{-(-3)+-\sqrt{(-3)^2-4(2)(-5)}}{2(2)} \\\frac{3+-\sqrt{9+40} }{4}[/tex]

[tex]x = \frac{3+-7}{4}[/tex]

Hope this helps and God bless!

I need help like a lot​

Answers

i just want the points but if i do some math based off of the question i think its C

if a+ b = 5 ( a and b positive), find the maximum value of a² + b²​

Answers

Answer:

2 for A, 1 for B

The tiny floating two means multiply the number by itself, so;

[tex]2 * 2 = 4[/tex]

[tex]1 * 1 = 1[/tex]

Add the two together.

[tex]4 + 1 = 5[/tex]

Colleen is attending a carnival. The price of admission to the carnival is shown. It costs $3 to play a game. Colleen has $35.



A Ferris wheel is shown. Carnival admission is eight dollars.
What is the greatest number of games she can play?

Answers

Answer:

9

Step-by-step explanation:

Reduce the admission fee. Then divide the rest with cost per game

35 - 8 = 27

=> 27/3 = 9

HELP PLEASE! Chords NO and PQ are congruent. Arc NO measures 4x + 10 and Arc PQ measures 2x + 20. What is each of their measures?

Answers

4x + 10 = 2x + 20
4x - 2x = 20 - 10
2x = 10
x = 5

The measure of each arc is 30.

What is the arc of a circle?

The arc of a circle is defined as the part or segment of the circumference of a circle.

Given that, a circle, Chords NO and PQ are congruent. Arc NO measures 4x + 10 and Arc PQ measures 2x + 20.

We know that,

Chord Arcs Theorem :-

If two chords in a circle are congruent, then their intercepted arcs are congruent.

2x+20 = 4x+10

2x = 10

x = 5

Therefore,

2(5) + 20 = 30

Hence, the measure of each arc is 30.

Learn more about arcs, click;

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this picture represents 1-4 of the distance from maria house to the park which represents the whole distance?

Answers

There is no picture provided sorry.

PLS HELP
Find the distance between the two points.
(1,1)
√ [?]
Enter the number that
goes beneath the
radical symbol.
(3,-4)

Answers

Answer:

The number inside radical is 29

Step-by-step explanation:

Given:

Points (1,1) & (3,-4)

To find:

Distance between two points

Distance Formula:

[tex]\displaystyle \large{\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}}[/tex]

Determine (x2,y2) = (1,1) and (x1,y1) = (3,-4). Therefore:

[tex]\displaystyle \large{\sqrt{(1-3)^2+(1-(-4))^2}}\\\displaystyle \large{\sqrt{(-2)^2+(1+4)^2}}\\\displaystyle \large{\sqrt{4+5^2}}\\\displaystyle \large{\sqrt{4+25}}\\\displaystyle \large{\therefore \sqrt{29}}[/tex]

Therefore, the number inside the radical is 29

Answer:

[tex]\sqrt{29}[/tex]

Step-by-step explanation:

Hi there!

We are given the points (1, 1) and (3, -4)

We want to find the distance between the points

Distance can be found using the formula [tex]\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}[/tex], where [tex](x_1, y_1)[/tex] and [tex](x_2, y_2)[/tex] are points

We can label the values of the points first, before calculating to help avoid confusion and mistakes.

[tex]x_1 = 1\\y_1 = 1\\x_2 = 3 \\y_2 = -4[/tex]

Now substitute these values into the formula

d = [tex]\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}[/tex]

d = [tex]\sqrt{(3-1)^2 + (-4-1)^2}[/tex]

Now, using order of operations, first simplify what is in the parentheses:

d = [tex]\sqrt{(2)^2 + (-5)^2}[/tex]

Now raise 2 and -5 to the second power.

d = [tex]\sqrt{4 + 25}[/tex]

Add the numbers together under the radical

d = [tex]\sqrt{29}[/tex]

The distance is [tex]\sqrt{29}[/tex]

Hope this helps!

See more on finding the distance here: https://brainly.com/question/24774555

When building a house, the number of days required to build varies inversely with with the number of workers. One house was built in 136 days by 7 workers. How many days would it take to build a similar house with 34 workers

Answers

Answer:

it would take them 4 days to build the house

What decimal part of 560 is 70

Answers

Answer: 0.125

Step-by-step explanation: 70/560

The sum of the measures of the interior angles of a polygon is given. How
many sides does the polygon have?
3) 3060
4) 6480
Sides:
Sides:

Answers

Answer:

19sides if sum is 3060

38sides if sum is 6480

Find the values of the variables:

Answers

Answer:

x = 150

y = 30

Step-by-step explanation:

x° = 5y° (corresponding angles) (1)

x° + y° = 180° (Linear pair angles) (2)

From equations (1) and (2), we find:

5y° + y° = 180°

-> 6y° = 180°

-> y° = 180°/6

-> y° = 30°

-> y= 30

-> x° = 5(30°) = 150° (From equation 1)

-> x = 150

Which is an equation for the line that contains the points (-2, 3) and (2, -1)?

Answers

Answer:

J

Step 1. Find slope

(-1 - 3)/(2 + 2)

-4/4

m = -1

Step 2. Write equation

y - 3 = -1 (x + 2)

y = -x -2 + 3

y = -x + 1

Answer:

Step-by-step explanation:

First find the slope:

[tex]\frac{-4}{4} =-1[/tex]

This immediately rules out all answers but J.

Mary is 63.5 inches tall and her sister Tonya is 70 inches tall. Tonya wants to know how many inches taller she is than Mary. Which equation and solution can be used to solve this problem?
x + 70 = 63.5: Subtract 70 from both sides. The answer is 6.5 inches.
63.5 + x = 70: Subtract 63.5 from both sides. The answer is 6.5 inches.
x minus 63.5 = 70: Add 63.5 to the left side and subtract 63.5 from the right side. The answer is 6.5 inches.
63.5 minus x = 70: Subtract 63.5 from both sides. The answer is 6.5 inches.

Answers

Answer: second option

Step-by-step explanation: Mary's age plus X = 70

63.5 + X = 70

Subtract 63.5 from both sides

X = 70 -63.5

Answer 6.5

Find the midpoint of the segment with the given endpoints.

G(–4, 4) and H(2, 10)

Answers

Answer:

Midpoint (-1,7)

Step-by-step explanation:

To find a midpoint, average the x's and then average the y's (add and divide by 2)

The x-coordinate of the midpoint is: (-4+2)/2

= -2/2

= -1

and the y-coordinate is:

(4+10)/2

= 14/2

= 7

So the midpoint is:

(-1,7)

Answer:

(-1, 7)

Step-by-step explanation:

Midpoint of a line segment

[tex]\textsf{Midpoint}=\left(\dfrac{x_2+x_1}{2},\dfrac{y_2+y_1}{2}\right)\quad \textsf{where}\:(x_1,y_1)\:\textsf{and}\:(x_2,y_2)\:\textsf{are the endpoints}[/tex]

[tex]\textsf{let}\:(x_1,y_1)=(-4,4)[/tex]

[tex]\textsf{let}\:(x_2,y_2)=(2,10)[/tex]

[tex]\implies \textsf{Midpoint}=\left(\dfrac{2+(-4)}{2},\dfrac{10+4}{2}\right)=(-1,7)[/tex]

A bag contains 8 red marbles, 4 blue marbles and 2 green marbles. If two marbles are
drawn out of the bag, what is the exact probability that both marbles drawn will be
red?

Answers

Answer:

Step-by-step explanation:

Fourteen people are entered in a race. If there are no ties, how many ways can the first three places come out

Answers

Answer:

2184 ways because that's how math works

Step-by-step explanation:

14 × 13 × 12

1)
В
13
C
105°
7
A

a. 36.2
b40.2
c81.6
d43.9

Answers

Answer:

Step-by-step explanation:

Could you update the question? It is not clear enough

solve for x : -18 = x -17

Answers

Answer: X= 306/19

Step-by-step explanation:

Help a b c d or e what one

Answers

Answer: D

Step-by-step explanation: The others dont have A m or an s

A technology company is going to issue new ID codes to its employees. Each code will have two letters, followed by one digit, followed by one letter. The letters D ,Z G , and and the digit 8 will not be used. So, there are 23 letters and digits that will be used. Assume that the letters can be repeated. How many employee ID codes can be generated?

Answers

The number of times employee ID codes can be generated is that have two letters, followed by one digit, followed by one letter is 109503.

What is arrangement?

Arrangement of the things or object is mean to make the group of them in a systematic order, in all the possible ways.

The number of possible ways to arrange is the n!.Here, n is the number of objects.

A technology company is going to issue new ID codes to its employees. Each code will have two letters, followed by one digit, followed by one letter.

The letters D ,Z, G  and Z and the digit 8 will not be used. So, there are 23 letters and 9 digits that will be used. The letters can be repeated.

[tex]\text{Each code=Two latter + One digit}[/tex]

The first letter is chosen from the 23 letters in 23 number of ways. As letters can be repeated, thus second letter chosen from 23 letters in 23 ways.

One digit can be chosen from the 9 digits in 9 different ways. The last letter can also be chosen in 23 ways. Thus, the number of times employee ID codes can be generated is,

[tex]n=23\times23\times9\times23\\n=109503[/tex]

Thus, the number of times employee ID codes can be generated is that have two letters, followed by one digit, followed by one letter is 109503.

Learn more about the arrangement here;

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what is the area of a circle with a diameter of 4cm
please respond with full work too! pls and ty
{for a BIG test}


for algebra topic: reflections

Answers

Answer:

Are of a Circle = pie x radius squared

Step-by-step explanation:

A = 3.14*2squared

A = 3.14*4

A = 12.56


Juan earns 20% commission as a salesperson. He sold a trampoline that cost $86.40 How
much commission did Juan earn?

Answers

Answer:

$17.28

Step-by-step explanation:

20% of $86.40

= [tex]\frac{20}{100}[/tex] × $86.40

= 0.2 × $86.40

= $17.28 ← commission

 

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