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Minchanka [31]
2 years ago
7

Evaluate the expression when x = 2, y = 5, and z = 4.

Mathematics
2 answers:
REY [17]2 years ago
8 0

Answer:

9 is the correct answer

(2×2+1)=5÷5×9=9

Tems11 [23]2 years ago
7 0
9x5 divided by (2x2+1)
45 divided by 4+1
45/5=9
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Help please <br> 5x-2y=-10
Lena [83]

Answer:

5x - 2y =  - 10 \\ 5x =  - 10 + 2y  \\  x =  \frac{ - 10 + 2y}{5}  \\  \\

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2 years ago
Two times x is 8 more than y. The sum of x and two times y is 14. Write two equations and graph to find the value of y.
Sauron [17]

Option B: $y=4$ is the value of y

Explanation:

It is given that "Two times x is 8 more than y". Writing it as expression, we have,

2x=8+y

It is also given that "The sum of x and two times y is 14". Writing it as expression, we have,

x+2y=14

To find the value of y, let us solve the two equations using substitution method.

From the equation 2x=8+y , let us find the value of x.

x=\frac{8+y}{2}

x=\frac{8}{2} +\frac{y}{2}

x=4+\frac{y}{2}

Now, substituting x=4+\frac{y}{2} in the equation x+2y=14 , we get,

4+\frac{y}{2}+2y=14

      4+\frac{5y}{2} =14

            $\frac{5 y}{2}=10$

            5y=20

              $y=4$

Thus, the value of y is $y=4$

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