Ask question

Ask question

All categories

IgorLugansk [536]

4 years ago

15

What is the value of the expression?

1 answer:

KengaRu [80]4 years ago

8 0

Answer:

<h2>B. -3.2</h2>

Step-by-step explanation:

$4\!\!\!\!\diagup^1\cdot\dfrac{-6.4}{8\!\!\!\!\diagup_2}=-\dfrac{6.4}{2}=-3.2$

You might be interested in

The axis of symmetry for the graph of the function is f(x) = x2 + bx + 10 is x = 6. What is the value of b?

joja [24]

Answer:

$b=-12$

Step-by-step explanation:

we have

$f(x)=x^{2}+bx+10$

we know that

The equation of a vertical parabola into vertex form is equal to

$y=a(x-h)^{2} +k$

where

(h,k) is the vertex of the parabola

and the axis of symmetry is equal to $x=h$

In this problem we have the axis of symmetry $x=6$

so

the x-coordinate of the vertex is equal to $6$

therefore

For $x=6+1=7$ -----> one unit to the right of the vertex

Find the value of $f(7)$

$f(7)=7^{2}+b(7)+10$

$f(7)=59+7b$

For $x=6-1=5$ -----> one unit to the left of the vertex

Find the value of $f(5)$

$f(5)=5^{2}+b(5)+10$

$f(5)=35+5b$

Remember that

$f(5)=f(7)$ ------> the x-coordinates are at the same distance from the axis of symmetry

so

$59+7b=35+5b$ ------> solve for b

$7b-5b=35-59$

$2b=-24$

$b=-12$

3 0

3 years ago

Read 2 more answers

Suppose M is the midpoint of line FG.

alukav5142 [94]

$A)\\|FM|=5y+13;\ |MG|=5-3y\\\\|FG|=|FM|+|MG|\\\\|FG|=(5y+13)+(5-3y)=2y+18\\\\B)\\|FM|=8a+1;\ |FG|=42\\\\|FG|=2|FM|\\\\2(8a+1)=42\\16a+2=42\ \ \ \ \ |subtract\ 2\ from\ both\ sides\\16=40\ \ \ \ \ |divide\ both\ sides\ by\ 16\\a=\frac{40}{16}\\a=\frac{5}{2}\\a=2.5$

6 0

3 years ago

Please help me on this one

lara31 [8.8K]

Answer:8600

Step-by-step explanation:

477

8 0

4 years ago

What value of a make the equation 14-a=19-12

abruzzese [7]

$14-a=19-12\\14-a=7\\a=14-7\\a=7$

5 0

2 years ago

Read 2 more answers

Share 747 pound in the ratio 2:7 betwen tom and ben

Yuliya22 [10]

2p + 7p = 747
9p = 747 divded by 9 = 83
2 * 83 = 166 7 * 83 = 581

Hope it helps

7 0

3 years ago