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3 years ago

14

The number of students in each of the seventh grade homerooms that volunteer in the office are shown in the table. use mental ma

th to find the total number of students who volunteered. expain office volunteer homeroom number of students A. 6 B. 5 C. 4 D. 8 please help me

1 answer:

natta225 [31]3 years ago

3 0

I need to see the table

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Which of the following statements uses the commutative property of addition?

rosijanka [135]

C is what I would say

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What is true of the function g(x)=-2x^2+5?

mart [117]

Answer:

C) The variable x represents the independent variable.

Step-by-step explanation:

The given function is $g(x)=-2x^2+5$ .

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The correct choice is C

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Please help me on question 19

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W+w+w+w+w+15-7 I got this wrong on a math question. I did 5w+8 = 13w

Aleonysh [2.5K]

$w+w+w+w+w+15-7=\underbrace{w+w+w+w+w}_5+(15-7)\\\\=5w+8-\text{finish}\\\\\text{You can not add 5w and 8. These are different monomials.}$

Example:

5w - five apples

8 - eight strawberries

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a_sh-v [17]

Answer:

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Step-by-step explanation:

The given quadratic equation is $x^2+4x-21=0$ . We need to find the solution of this equation.

If the equation is in the form of $ax^2+bx+c=0$ , then its solutions are given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Here, a = 1, b = 4 and c = -21

Plugging all the values in the value of x, such that :

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So, the solutions of the quadratic equation are 3 and -7.

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