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Vikentia [17]
2 years ago
6

100 points if you answer all these questions

Mathematics
2 answers:
Aleksandr [31]2 years ago
5 0

Answers:

<h3>Distributive Property</h3><h3>Addition Property of Equality</h3><h3>Division Property of Equality</h3>

Step-by-step explanation:

Let's solve this problem step-by step to see what we use to solve this.

<h3>Step 1: Distributive Property</h3>

3x - 9 = 12

<h3>Step 2: Addition Property of Equality</h3>

3x = 21

<h3>Step 3: Division Property of Equality</h3>

x = 7

I'm always happy to help :)

almond37 [142]2 years ago
3 0

Distributive Property, Addition Property of Equality, Division Property of Equality

To solve this problem is to see what we have to  use to solve this.

First step: Distributive Property: 3x - 9 = 12

Second step: Addition Property of Equality: 3x = 21

Third step: Division Property of Equality: x = 7

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alisha [4.7K]

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Smoke, Condensation, mist

Step-by-step explanation:

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5 0
3 years ago
Variable y varies directly with x2, and y = 96 when x = 4.
lakkis [162]
Direct variation is y = kx, where k is the constant of variation.
 But now it says y varies directly with x2 (or 2x), so now the x in the equation is 2x.

The equation is y = k(2x)
 Now you find k.
y = 96 when x = 4.
(96) = k(2*4)
96 = k(8)
k = 12
 
The equation is now y = 12(2x)
To find the value of y when x=2, plug 2 into the equation you made. y = 12(2*2) y = 48
_________________
Now it's with a "quadratic variation," which is the same thing except x is squared.
The equation is y = kx^2
 
But y varies directly with x2 (same thing as 2x), so now it's y = k(2x)^2.
 
Now you find k by substituting y and x values that were given.
y = 180 when x = 6
(180) = k(2*6)^2
180 = k(12)^2
180 = k(144)
k = 1.25
k, 1.25, is the constant of variation.
4 0
2 years ago
A girl has $2.87 in pennies, nickels, dimes, and quarters. If she has an equal number of coins of each kind, how many coins does
nata0808 [166]
The answer is twenty-eight coins in all, or seven of each coin.
8 0
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Does anybody know this answer if so please help
andreyandreev [35.5K]

Answer:

It is first one

Step-by-step explanation:

3 0
3 years ago
Solving systems by elimination <br> 9x+3y=-3 <br> 2x-3y=-8
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Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

x

=

−

1

Step-by-step explanation:

5 0
3 years ago
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