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Vikentia [17]
3 years ago
15

Solve each equation. check you solution. (7t - 2) - (-3t + 1) = -3(1 - 3t)

Mathematics
1 answer:
Lynna [10]3 years ago
5 0
(7t-2) - (-3t+1) = -3*(1-3t)
First distribute:
7t-2+3t-1 = -3+9t
Now get all the terms with 't' on the same side by subtracting/adding:
7t+3t-9t = -3+2+1
Combine the terms:
1t=0
t=0

Check:
Plug in 0 for t and see if both sides of the equation come out the same:
Does (7(0)-2) - (-3(0)+1) = -3(1-3(0))  ?
(-2) - (1) = -3(1)  ?
-3 = -3  ?
Yes! It works, so t=0! 
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The functions g and h are given by g(x) = x + 1 and h(x) = x²
Delvig [45]

Answer:

x = - \frac{3}{2} , x = 2

Step-by-step explanation:

To find h(g(x)) substitute x = g(x) into h(x) , that is

h(g(x))

= h(x + 1)

= (x + 1)²

= x² + 2x + 1

For h(g(x)) = 3x² + x - 5 , then

3x² + x - 5 = x² + 2x + 1 ← subtract x² + 2x + 1 from both sides

2x² - x - 6 = 0 ← in standard form

(2x + 3)(x - 2) = 0 ← in factored form

Equate each factor to zero and solve for x

2x + 3 = 0 ⇒ 2x = - 3 ⇒ x = - \frac{3}{2}

x - 2 = 0 ⇒ x = 2

5 0
2 years ago
Are these answers correct? If not, what would the answers be?
Ludmilka [50]
Yes you have the correct answers for each of the four problems. Nice work.

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7 0
3 years ago
I need help lolsssss
MissTica

Answer:

$0.75 per song

Step-by-step explanation:

Given that the relationship between variable s and c is a proportional relationship, and is represented by the equation, c = 0.75s.

Where,

c = total costs

s = number of songs

The constant of proportionality, k, = 0.75.

Thus, 0.75 represents the cost per sing downloaded.

The answer is:

✔️$0.75 per song

7 0
3 years ago
Evaluate the expression for <br> b = -6.<br> 3b =
ch4aika [34]

Answer:

-18

Step-by-step explanation:

Hope that helps

You do 3(-6) to get neg 18

6 0
3 years ago
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Brent bought shirts for $50. Each shirt cost $10. How many shirts did he buy?
AVprozaik [17]
ANSWER: the man bought 5 shirts
6 0
2 years ago
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