PLEASE HELP FAST!!!!!

PLEASE HELP FAST!!!!!

Answers

Answer 1

Answer:

The solution of the system of equations be:

[tex]x=8,\:y=4[/tex]

Hence, option C is true.

Step-by-step explanation:

Given the system of equations

[tex]\begin{bmatrix}4x+7y=60\\ -4x+7y=-4\end{bmatrix}[/tex]

adding both the equations

[tex]-4x+7y=-4[/tex]

[tex]+[/tex]

[tex]\underline{4x+7y=60}[/tex]

[tex]14y=56[/tex]

so the system of equations becomes

[tex]\begin{bmatrix}4x+7y=60\\ 14y=56\end{bmatrix}[/tex]

solve 14y for y

[tex]14y=56[/tex]

Divide both sides by 14

[tex]\frac{14y}{14}=\frac{56}{14}[/tex]

Simplify

[tex]y=4[/tex]

[tex]\mathrm{For\:}4x+7y=60\mathrm{\:plug\:in\:}y=4[/tex]

[tex]4x+7\cdot \:4=60[/tex]

[tex]4x+28=60[/tex]

Subtract 28 from both sides

[tex]4x+28-28=60-28[/tex]

Simplify

[tex]4x=32[/tex]

Divide both sides by 4

[tex]\frac{4x}{4}=\frac{32}{4}[/tex]

[tex]x=8[/tex]

Therefore, the solution of the system of equations be:

[tex]x=8,\:y=4[/tex]

Hence, option C is true.


Related Questions

At a sale, hats were sold for $15 each. This price was 60% of theiir original price. What was the original price?

Answers

It was originally $37.50

Answer:

6$

Step-by-step explanation:

6$ I'm probably looking at this wrong, but it does estimates towards 6. If I'm right then, with the 60% They boost the hats price by 60% (ofc).

if that was the question. the the answer must be 6$. I think, I calculated discount, welp,

Hello guys, plz help me with this question ASAP! Its about exponential function. Plz answer if you know the answer, THANK YOU SO MUCH ☺️

Answers

Answer:

4.5%

Step-by-step explanation:

Equation that models this:

M(t) = 1000 * (1 + INTEREST)^t

Plugging in t= 10 years, gives

1553 = 1000 (1+interest)^10

solving for interest gives: 0.045 which is 4.5%

How many roots are there for the polynomial that factors into
f(x) = (x^2-1)(x+2)(x-1)^2?

Answers

Answer:

3 roots

tho using the fundamental theorem of algebra there should be more, if you use Desmos,there are 5

Step-by-step explanation:

Express as a percentage.

10

Answers

Answer:

10% is ur answer

Step-by-step explanation:

Solve the equation 3x^2
10x + 5 = 0 to the nearest tenth.

Answers

Exact form x= - 1/2 decimal form x=- 0.5

Fill in the box with x + - Nd divide

Answers

Answer:

[tex]3 \boxed{ + }12 \boxed{ \div }4 = 3 + \frac{12}{4} = 3 + 3 = 6[/tex]

hope this helps.

a watch loses 30 secs every hour .If the watch was set right on sunday 11:30 .What is time did it show

Answers

The correct question is

A watch loses 30 secs every hour .If the watch was set right on Sunday 11:30pm .What is time did it show after 10 hours?

(a) Monday 9:25am

(b) Monday 9:30 am

(c) Monday 9:35

(d) Monday 9:25pm

Answer:

(a) Monday 9:25am

The time shown by the watch in 10 hours from its starting at 11:30pm on Sunday will give 9:25am on Monday.

Step-by-step explanation:

We are given that a watch looses 30 seconds in one hour and the Watch was set on 11:30pm on Sunday.

we need to find the time this watch will show after 10 hours from starting at 11:30pm on Sunday.

In 1 hour = 30 seconds is lost

In 10 hours = 30*10 = 300seconds

Converting 300 seconds into minutes we get

 = 300/60 = 5 minutes

This means whatever the actual time will be this watch will shows 5 minutes less.

10 Hours from 11:30pm on Sunday will be

9:30am on Monday morning

but since the watch is slow by 30 seconds each hours which will make 5 minutes difference from the real time in 10 hours so the time shown by the watch will be

9:25am on Monday morning.

Therefore the time shown by the watch in 10 hours from its starting at 11:30pm on Sunday will give 9:25am on Monday.

Type the correct answer in each box. Use numerals instead of words.
Micah is keeping track of how much he spends this month on gas. In the first week, he bought x gallons of gas at $2.39 per gallon. In
the second week, he bought 3 fewer gallons of gas than the first week at $2.49 per gallon. So far this month, he has spent a total
$46.21 on gas.
In the first week, Micah bought
gallons of gas
in the second week, Micah bought
gallons of gas

Answers

Answer:

Micah bought 11 gallons of gas in the first week and 8 gallons of gas in the second week

Step-by-step explanation:

Answer:

Step-by-step explanation:

Micah bought 11 gallons of gas in the first week and 8 gallons of gas in the second week

11: (22, 12). (8.10)
12: (8, 20), (13, -30)
What is the slope equation?

Answers

Answer:

for number 11 the slope is 7 and for number 12 the slope is 10

Step-by-step explanation:

1.496 x10∧8 - 1.4246 x10∧9 =

Answers

Answer:

THE ANSWER IS -6.246

Step-by-step explanation:

$5 is what percent of $5?

Answers

Answer:

$5 is 100% of $5.

Answer:

$5 is 100% of $5

Step-by-step explanation:

Putting this into fraction format, it would be 5/5 = 1 . if that fraction turned out to be less than 1, whatever the number was that would be the percent. But this came out as 1 therefore saying that $5 is 100% of $5

What is the slope of the line that passes through the points (−3,−3) and (−9,5)?

Answers

Um -4,4 I’m kind of guessing cause u didn’t give any options

A school buys games for 6 classrooms. It buys 3 board games, 4 puzzles, and 1 video for each classroom. How many games dose the school buy?​

Answers

Answer:

42

Step-by-step explanation:

4+3=7

7x6 = 42

Given h (x) = 5 x + 1, find h(2)

Answers

Answer:

h(2) = 5.2 + 1 = 10 + 1 = 11

5. What's the sum of 3/8 and 1/16

Answers

Answer:

7/16

Step-by-step explanation:

3/8=6/16

6/16 + 1/16 = 7/16

Please help !!!!!!!!!

Answers

Answer:

A= 41°   a=9.84...  b=11.32...

Step-by-step explanation:

given B = 49° and C = 90°

and A + B + C = 180

so  49+90+A=180

A= 41°

we also know c (small)  is 15 units

and maybe you know this  SOH CAH TOA?   no, i'm not calling anyone names :P  this is just the mnemonic to memorize how sin , cos and tan fit sin(Ф)=Opp/Hyp   Cos(Ф)=Adj/Hyp  Tan(Ф)=Opp/Adj

Hyp is the hypontenuse of the triangle ( the long side). Opposite (Opp) means the side opposite from what ever angle you are starting at..adjacent (Adj) means what ever angle is next to where you are starting from.

use Cos(49) to find the side a

a is an adjacent side to the 49 angle.  We know the Cos and we know the Hyp .. so solve for adj...  

Cos(Ф)=Adj/ Hyp

Hyp*Cos(Ф)=Adj    

15*Cos(49)= Adj

9.84...=Adj=a

now lets' use sin for the opposite side or b

sin(Ф)=Opp/Hyp

Hyp*Sin(Ф) = Opp

15*sin(49)= Opp

11.32...= Opp =b

 

Which of the following is the midpoint of the segment with endpoints (9,4) and (-3, 2)

Answers

Answer:

The midpoint is (3,3)

Step-by-step explanation:

true or false The angle of depression is the angle formed above the horizontal line​

Answers

Answer:

False

Step-by-step explanation:

Trust me

False statement the angle of depression is the angle formed is not above the horizontal line​.

What is the angle of depression?

The angle of depression is defined as the angle obtained by any object below the horizontal line which is used as the reference line.

Here in the question, they are asking The angle of depression is the angle formed above the horizontal line​ this statement is true or false.

If you will follow the above definition of the angle of depression you will see that the given statement is false.

To know more about the angle of depression follow

https://brainly.com/question/10217662

#SPJ2

Pls help 10 points. ac+b=

A=3
B=5
C=1

Answers

Answer:

The answer should be 3×1+5=8

Step-by-step explanation:

prove me wrong

Answer:

8

Step-by-step explanation:

AC means 3 times 1 which is 3. B equals to 5. 3 plus 5 equals to 8.

3(-2a-4)+3a using distributive property

Answers

The answer is -3(a+4)

Answer:

Step-by-step explanation:

3(-2a-4)+3a

-6a-12+3a

-3a-12

-3(a+4)

:)

Compare 24 greater than, less than, or equal to 4.256.

Answers

Answer:

Greater than 4.256

Step-by-step explanation:

Because 24 is a whole number and so is the 4 in 4.256. So Because 24 is larger than 4 it is automatically greater than 4

24 is greater than 4.256

-2 = g - 9 what does G equal??

Answers

g = 7. Just add 9 to both sides of the equation.

look at previous questions for context

Answers

Answer:

y = 1/2x - 6

Step-by-step explanation:

Here, we want to get the equation of the line that passes through the given points

Mathematically we can write the equation of a line as;

y = mx + b

where m is slope and b is the y-intercept

We start by getting the slope

m = (y2-y1)/(x2-x1)

m = (-1+5)/(10-2) = 4/8 = 1/2

So we have the equation partially as;

y = 1/2x + b

to get c, we use any of the two points and substitute the individual x and y values

-1 = 1/2(10) + b

-1 = 5 + b

b = -1-5 = -6

so the equation is;

y = 1/2x - 6

D. (-2, 0)
can you plz help
more than one answer

Answers

The answer is C- (0,10)

What is the solution of....

Answers

[tex]\huge \mathscr{\blue {\underline {\red{\underline{Answer :-}}}}} [/tex]

[tex] \bf \frac{5}{2} x - 7 = \frac{3}{4} x + 14[/tex]

[tex] \bf \implies \: \frac{5}{2} x - \frac{3}{4} x = 14 + 7[/tex]

[tex] \bf \implies \: \frac{10x - 3x}{4} = 14 + 7[/tex]

[tex] \bf \implies \: \frac{7}{4} x = 21[/tex]

[tex] \bf \implies \: 7x = 21 \times 4[/tex]

[tex] \bf \implies \: x = \frac{21 \times 4}{7} [/tex]

[tex] \bf \implies \: x = 3 \times 4[/tex]

[tex] \bf \implies \: x = 12[/tex]

ᴏᴘᴛɪᴏɴ () x = 12 ɪs ʏᴏᴜʀ ᴄᴏʀʀᴇᴄᴛ ᴀɴsᴡᴇʀ

[tex]{\huge{\underline{\small{\mathbb{\blue{HOPE\:HELPS\:UH :)}}}}}}[/tex]

HELP PLEASEEE whoever answers most questions (aka 4) gets brainliest

Answers

Answer:

1.A

2.D

3.C

4.C

Step-by-step explanation:

The value of the exponent in (22)−5

is​

Answers

Answer:

Let's calculate:

22-5

• Remove minus in the exponent and invert the base:

= (1/22)5

• Expand the multiplication:

= (1/22) * (1/22) * (1/22) * (1/22) * (1/22)

• Find your result:

= 1/5153632 ≈ 0.000000194038

HELP. How many solutions does this graph indicate for the system of conic
sections?

Answers

Answer:

2

Step-by-step explanation:

there are two points where it touches

HURRY UP PLS


Martin has 90 cents in his
pocket. Three of the coins are dimes, and the rest
are nickels. How many nickels does he have?
O A. 10
O B. 12
Oc. 18
O D. 6

Answers

B.12

90-30=60
60\5= 12

I really need help with this question asap!

Answers

Answer:

the answer is C

Step-by-step explanation:

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