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kondaur [170]
2 years ago
8

Amata mixes 2 parts black paint with 3 parts white paint to make 90 mL of gray paint. How much white paint does Amata use to mak

e the gray paint?
A 18 mL

B 30 mL

C 45 mL

D 54 mL​

José chose A as the correct answer. How might he have gotten that answer?​
Mathematics
1 answer:
Orlov [11]2 years ago
6 0

Answer:

is 18 because 6x3 is 18 ok

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Solve the following system of equations by substitution. Show all steps.
Alinara [238K]

Answer:

Given system of equations:

\begin{cases}f(x)=-x^2+2x+3\\g(x)=-2x+3\end{cases}

To solve by substitution, equate the equations and solve for x:

\begin{aligned}f(x) & = g(x)\\\implies -x^2+2x+3 & = -2x+3\\-x^2+4x & = 0\\x^2-4x & = 0\\x(x-4) & = 0\\\implies x & = 0\\\implies x-4 & = 0 \implies x=4\end{aligned}

Therefore, the x-values of the solution are x = 0 and x = 4.

To find the y-values of the solution, substitute the found values of x into the functions:

f(0)=-(0)^2+2(0)+3=3

g(0)=-2(0)+3=3

f(4)=-(4)^2+2(4)+3=-5

g(4)=-2(4)+3=-5

Therefore, the solutions to the given system of equations are:

(0, 3) and (4, -5)

4 0
2 years ago
The square root of 7 lies between what two numbers
ExtremeBDS [4]

The square root of 7 would like between 2 and 3. This is because 2 x 2 is 4's square root and 3 x 3 is nine's square root. Seven is between four and nine.

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2 years ago
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Need help on answering number 13.
Genrish500 [490]
You can find the value of y when you substitute the x value into the equation.

Since x = 3, the equation becomes:
y = 3 + 5

The answer to question 13 is y = 8
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3 years ago
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What is the distance between 178 and 313 on a number line some one help me​
xxTIMURxx [149]
The answer for this is 135
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The sum of 1 and 6, divided by 7.<br><br> A) 1+6/7<br> B) 1-6/7<br> C) 1/7+6<br> D) (1+6)/7
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D; 1 and 6 are being added together first then divided by 7, so need the parentheses around 1 and 6
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