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3 years ago

22=7+3x please explain. I think you do -22 on both sides

2 answers:

7 0

No, 22 should stay on its own side but x needs to be alone. so start on the 7+3x side and get 22 alone.
22=7+3x should start with subtracting seven instead of 22 then dividing by 3 and you will find the answer

Jet001 [13]3 years ago

3 0

22=7+3x
22-7 = 3x
15=3x
15/3=x
5=x

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To eliminate the y-terms and solve for x in the fewest steps, by which constants should the equations be multiplied by before ad

vovikov84 [41]

Answer:

use -9 to multiply the first equation

use -4 to multiply the second equation.

Step-by-step explanation:

5x-4y=28.....eqn (1)×-9

3x-9y=30....eqn(2)×-4

-45x+36y=-252

-(-12x+36y=-120)

therefore, -33x÷33 =-132÷-33

x=4.

substitute (x=4) in any of the equation. I'm just going to use eqn 1.

5x-4y=28

5(4)-4y=28

20-4y=28

-4y =28-20

-4y÷-4 = 8÷-4

y=-2

so, x=4, y=-2

Note: for proof of answers substitute the answers for x and y and see if you have the same result...e.g

5(4)-4(-2)=28.

6 0

3 years ago

Read 2 more answers

Let f(x)=x^3 and g(x)= √x, and h(x)=x/3. Find each of the following: f(g(h(6)))

rewona [7]

Answer:

go from inside out.

h(x)=x/3

$(\sqrt{2})^{3}$ => h(6) = 6/3 = 2

g(x) = $\sqrt{x}$

=> g(h(6)) = g(2) = $\sqrt{2}$

f(x) = $x^{3}$

=> f(g(h(6))) = f( $\sqrt{2}$ ) = $(\sqrt{2} )^{3}$

6 0

3 years ago

Mai and Jada are both running on a treadmill. Mai travels 5 miles in 15 minutes. Jada travels 4 miles in 14 minutes. Who ran at

sasho [114]

Answer:

Mai

Step-by-step explanation:

To find the rate, you must determine who is going faster per minute. To do this, you must divide the total number of miles by the total number of minutes.

Mai: 5 miles / 15 minutes = 1/3 miles per minute

Jada: 4 miles / 14 minutes = 2/7 miles per minute

Then, use a common denominator to make calculations easier:

Mai: 1/3 * 7/7

Jada: 2/7 * 3/3

You should get:

Mai: 7/21 miles per minute

Jada: 6/21 miles per minute

By looking at this, you can see that Mai is traveling slightly faster, going more miles than Jada per minute.

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3 years ago

Mhanifa please help! Solve each proportion. Round your answer to the nearest hundreth

Marianna [84]

Answer:

5) m/5 = 7/2 ⇒ m = 5*7/2 ⇒ m = 35/2
6) 7/4 = r/5 ⇒ r = 5*7/4 ⇒ r = 35/4
7) 7/6 = 5/x ⇒ x = 5*6/7 ⇒ x = 30/7
8) 6/5 = 2/(5n) ⇒ 5n*6 = 5*2 ⇒ n = 10/30 ⇒ n = 1/3

4 0

3 years ago

2(x+3)=x-4<br> please help me <3

vovikov84 [41]

2(x + 3) = x - 4

distribute

2x + 6 = x - 4

either subtract 6 from both sides or add 4. i will be subtracting 6.

2x = x - 10

subtract x from both sides

x = -10

4 0

2 years ago