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Kisachek [45]
3 years ago
14

5x + 7 = 42, Is x = 7 the solution for this equation? Justify your answer for it is or it is not

Mathematics
2 answers:
Doss [256]3 years ago
7 0

Answer:

7 is a solution.

Step-by-step explanation:

Step 1: Write equation

5x + 7 = 42

Step 2: Solve for <em>x</em>

  1. Subtract 7 on both sides: 5x = 35
  2. Divide both sides by 5: x =7
tigry1 [53]3 years ago
7 0

Answer:

<h2>x = 7</h2><h2 />

Step-by-step explanation:

5x + 7 = 42

5x = 42 - 7

x = 35 / 5

x = 7

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A washing machine sells for $201 after being discounted by 40 percent. What was the original price of the washing machine?
olga_2 [115]

Step-by-step explanation:

Let original price be x

Price after 40% discount is $201

Therefore

x × 40% = $201

x = 201 ÷ (40/100)

x = 502.5

Therefore, the original price is $502.5

Hope it helps :)

5 0
3 years ago
For a moving object, the force acting on the object varies directly with the objects acceleration. When a force of 35 N acts on
Genrish500 [490]
<h3>Answer:  3 m/s^2</h3>

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

According to Newton's Second Law, we know that

F = m*a

where F is the force applied, m is the mass and 'a' is the acceleration.

We see that this is a direct variation equation for F and a, such that m is the constant of variation. It's similar to how y = kx is also a direct variation equation.

Plug in F = 35 and a = 5 to find m

F = ma

35 = m*5

35/5 = m

7 = m

m = 7

The object has a mass of 7 kg

Our equation F = ma updates to F = 7a

Now plug in the force F = 21 to find 'a'

F = 7a

21 = 7a

21/7 = a

3 = a

a = 3

The acceleration will be 3 m/s^2

Notice how a smaller force applied means that the acceleration has also gone down as well.

8 0
3 years ago
Question 42<br> 09.020<br> Ος<br> O
goldfiish [28.3K]

Answer:

the correct answer is C: 38÷16

38÷16 = 2.375

4 0
2 years ago
What is the answer to 7y+13=5y-3
Savatey [412]
7y+13=5y-3
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7 0
3 years ago
Read 2 more answers
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lana66690 [7]

Answer:

the first option

Step-by-step explanation:

for this you just have to plug in -4 for x

f(-4) = 2 - 3(-4)

f(-4) = 2 - (-12)

f(-4) = 2 + 12

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6 0
3 years ago
Read 2 more answers
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