Solve the system of equations by substitution.
3x + 4y - 12
x + 7y = 8

Answers

Answer 1

Step-by-step explanation:

[tex]3x + 4y = 12 \\ x + 7y = 8 \\ x = 8 - 7y \\ 3(8 - 7y) + 4y = 12 \\ 24 - 21y + 4y = 12 \\ 12 = 17y \\ y = 0.705 \\ x = 8 - 7(0.705) = 3.065 = 3.07[/tex]


Related Questions

PLEASSSsSEEeeE HeLPpPp

Answers

Answer:

D = 59t

P = 42t

5 hours after noon, darmian is 17 miles closer to the stadium than paisley

Step-by-step explanation:

At noon, Damian is 383 miles away from the stadium and paisley is 315 miles away from the stadium.

Now, we are told that damians speed is 59 mph while paisley's speed is 42 mph.

At t hours after noon, their distance covered will be;

Damian; D = 59t

Paisley; P = 42t

This is because distance = speed × time

Now, 5 hours after noon, their respective distance covered will be;

D(5) = 59 × 5 = 295 miles

P(5) = 42 × 5 = 210 miles

This means that;

distance of Damian from the stadium is; 383 - 295 = 88 miles

Distance of paisley from the stadium is;

315 - 210 = 105 miles

Difference in their distances to the stadium = 105 - 88 = 17 miles

Thus, 5 hours after noon, darmian is 17 miles closer to the stadium than paisley

Find the value of x.

Answers

Answer:

x = 14

Step-by-step explanation:

83 * 2 = 9x + 40

166 = 9x + 40

9x = 126

x = 14

pls help me for brain list and a thanks and a 5 star review

Answers

3/4 + 2/4 = 6/4 or 3/2

Use the number line to add, second choice is simplified

what do you need to add to 3 5/7 to make 6​

Answers

6 is equal to 42/7, and 3 and 5/7 is 26/7 so 42-26 = 16/7 which is also 2 and 2/7 ths

HELP ME PLZZZZZZZZ



What is factoring by GCF?

(Please explain in your own words)

Answers

Answer:

GCF is the largest factor that all the terms have in common.

Step-by-step explanation:

What is the mean of the data set?
29, 26, 35, 34

Answers

the mean of that set is 31

Answer:

31

Step-by-step explanation:

Add all the numbers:

29 + 26 + 35 + 34 =  124

Divide by 4 (because there are 4 total numbers):

124/4 = 31

The system of equations is graphed on the coordinate plane.

y=−12x−2

y=−32x+2

Answers

Answer: either (-5,-0.5)

Step-by-step explanation:

In a fruit cocktail for every 100ml Orange juice you need 12ml Apple juice and 8ml of coconut milk what is the ratio of Apple juice to coconut milk to orange juice expressed in its simplest form

Answers

100:12:8 can be simplified to 25:3:2

Which equation would best describe the graph of y = |x|
after being stretched vertically?
A) y = 2|x|
B) y=-|x|
C) y = |x + 2|
D) y = |x – 3|

Answers

Answer:

The answer is A

Step-by-step explanation:

2. Larry jogs at a rate of 3 miles every 45 minutes. What is his unit rate in miles
per hour? *

Answers

Larry is running at 4 mph

Answer:

1/15 should be the answer

Step-by-step explanation:

Hope this helps

(Please help!!)

The length (l) of a retangular box is 5 centimeters more than twice its width (w).

Write an equation to represent the length of the rectangular box.

Answers

Answer:

l = 5 + 2w

_______

HELLp NOWWEEE I really need it plsss

Answers

Answer: diameter is 5.2 radius is 2.6

Step-by-step explanation:

60 problemi 3 saatte çözen Erdem
yarım saatte kaç problem çözer?​

Answers

Answer:

20 Problem Çözer

Step-by-step explanation:

60 ile 3'ü bölüyoruz. Ve Cevap 20 Çıkıyor.

anyone that's good at math please help <3

Answers

Answer:

i would try the first option,

Step-by-step explanation:

i'm not very good at math but i don't think the problem has exponents.

Factor the following binomial using the difference of squares?
(49x^2 – 9)

Answers

I think the answer is (7x-3)(7x+3)

3/4 x 12. Help please!!!!

Answers

Answer:

its 9

Step-by-step explanation:

Answer:

The answer is 9

Step-by-step explanation:

Have a wonderful day! :)

Is the given value a solution to the equation? 4(n) - 3 = -2(n) + 9 n=2

Answers

Answer:

Yes!

The solution to the equation is n = 2

Step-by-step explanation:

Given the equation

[tex]4\left(n\right)-3=-2\left(n\right)+9[/tex]

remove the parentheses

[tex]4n-3=-2n+9[/tex]

Add 3 to both sides

[tex]4n-3+3=-2n+9+3[/tex]

Simplify

[tex]4n=-2n+12[/tex]

Add 2n to both sides

[tex]4n+2n=-2n+12+2n[/tex]

Simplify

[tex]6n=12[/tex]

Divide both sides by 6

[tex]\frac{6n}{6}=\frac{12}{6}[/tex]

Simplify

[tex]n=2[/tex]

Therefore, the value of n = 2.

Hence,

Yes!

The solution to the equation is n = 2

What solid figure is shown below?

Answers

Answer:

froggy lookin kinda funky foo

what is 153.87 divided by 23

Answers

the answer will be 6.69

The result of dividing 153.87 by 23 is approximately 6.6847826087.

Given that we need to determine that what is 153.87 divided by 23,

To justify this answer, we can perform the division calculation:

  6.6847826087

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

23 | 153.87

    138

    -----

     158

     138

     -----

      208

      207

      -----

        10

The division is performed by dividing 23 into 153.87. We start by dividing 23 into 153, which gives us 6 as the whole number part of the quotient. We then subtract 138 (6 multiplied by 23) from 153, which leaves us with a remainder of 15.

To obtain a decimal approximation, we bring down the decimal point from the dividend (153.87) and continue the division process.

We add a zero after the decimal point in the dividend and divide again. This time, 23 goes into 158 (the new dividend) 6 times, giving us a partial quotient of 0.6.

The remainder is 158 minus 138 (6 multiplied by 23), which equals 20.

We bring down another zero and continue dividing.

23 goes into 208 (the new dividend) 9 times, resulting in a partial quotient of 0.69. The remainder is 208 minus 207 (9 multiplied by 23), which equals 1.

At this point, we can either stop or continue dividing to obtain more decimal places.

Therefore, the result of dividing 153.87 by 23 is approximately 6.6847826087.

Learn more about division click;

https://brainly.com/question/2684764

#SPJ6

The percentage of blue M&M's in a bag is 12%. If you have 125 M&M's in a bag, how many blue M&M's would you expect to have

Answers

Answer:

The expected amount of blue M&M's would be 15

Step-by-step explanation:

12% of 125 is 15 therefore you should expect 15.

The sum of two numbers is 46. The smaller number is 12 less than the larger number What are the numbers?

Answers

Answer:

x=0,y=46

Step-by-step explanation:

y-12=x

x+y=46

(y-12)+y=46

y+0=46

y=46

x=0

Can someone do this?

Answers

Yes, no, and yes are the answers respectively.

write an equation for the line below.

Answers

this should be the answer y= 2/3x +4

Factor.
28 - 4u
I don’t know how to factor 28-4u so if anyone can help thank you

Answers

Answer: 4(7-u)

Step-by-step explanation:

In order to factor, you have to find the GCF (Greatest Common Factor)

28:1, 28, 2, 14, 4, 7

4:1, 4, 2

The greatest common factor here is 4.

You can factor out 4 from this equation, therefore making it 4(7-u)

A circus has 12 performers, of which 3 are dancers.

What is the probability that a randomly selected performer will be a dancer?

Write your answer as a fraction or whole number.

P(dancer) =

Answers

Answer:

1/4

Step-by-step explanation:

Divide 12 by 4 to get the chance to pick a dancer

ASAP. Triangle ABC has angle measures as shown. complete sentences
(a) What is the value of x? Complete sentence. Show your work.
(b) What is the measure of each angle? Do the 3 angles add to 180 degrees? Show your work

Answers

In a triangle, the three angles ALWAYS add up to 180°

x + (6x + 10) + (x + 2) = 180

8x + 12 = 180

8x = 168

x = 21

To calculate the measure of each angle, substitute x in:

Angle A: 21

Angle B: 6(21)+10

Angle C: 21 + 2

Do the angles add up to 180 degrees? Just add the answer for A B and C and see if the sum is 180. It should be 180, if it isn't something is wrong with the calculation.

When you change y=Mx + b from m=1 to m=10? What happens

Answers

Answer:A linear equation in slope intercept form can be written y = mx + b. It ... To convert from slope intercept form y = mx + b to standard form Ax + By + C = 0, let m = A/B, collect all terms on the left side of the ... (2) - The slope of a line is -3/7 and the y- intercept is 10. ... All you have to do is isolate y on one side of the equal sign.

Step-by-step explanation:

What does it mean for a point to be a solution to a linear equation?

For example, if I say, "(2,5) is a solution to the equation (y=2x+3)," how could you check my claim?

Answers

Answer:

In your equation y=2x+3 and you used 2 [from your point (2,5) ] as the value of x, then y=2(2)+3=7.

now if you plotted this, that point would be (2,7), not (2,5).

So (2,5) is not the solution.

(2, 5) is not a solution of the linear equation [tex]y = 2\cdot x + 3[/tex].

Let be linear equation [tex]y = 2\cdot x + 3[/tex], if we know that [tex](x,y) = (2, 5)[/tex] and we need to check is [tex]2\cdot x + 3 = 5[/tex] by algebraic means, that is, we solve for [tex]x[/tex]:

[tex]2\cdot x + 3 = 5[/tex]

[tex]2\cdot x = 2[/tex]

[tex]x = 1[/tex]

Hence, we conclude that (2, 5) is not a solution of the linear equation [tex]y = 2\cdot x + 3[/tex].

We kindly invite to check this question on linear functions: https://brainly.com/question/17088086

Benjamin uses a $20 bill to pay for his lunch. He received more than $5 in change. Which number line shows the possible cost of Benjamin's lunch?

Answers

YUHHHHHHHHHHHHHHHHHHHHHH

The following histogram represents the number of hours students practice each week for band

How many hours did most students practice?

Answers

the answer is 5-6 :)

Answer:

Most Students practiced 5 to 6 hours

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