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AleksandrR [38]
3 years ago
7

A(x)= -5x+ 8. Find a (7)

Mathematics
2 answers:
Artemon [7]3 years ago
4 0
A(7)-32 that’s the answer
IRINA_888 [86]3 years ago
3 0

Answer:

a(7) = -32.

Step-by-step explanation:

if a(x) = -5x+8

then a(7) = -5(7) + 8.

-5(7) +8

-40+8

-32.

I hope this helps!

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What is the result of subtracting the second equation from the first? \begin{aligned} -7x-y &= 0 \\\\ 7x+8y &= -6 \end{a
Kitty [74]

Answer:

-14x-9y=6

Step-by-step explanation:

We are given with two equations

first equation is  -7x-y=0

second equation is

7x+8y=-6

we find the result of subtracting two equation

subtract the second equation from the first, so

first equation - second equation, multiply second equation by -1  and then add it with first equation

-7x-y=0

-7x-8y=+6

Now add both equations, we get

-14x-9y=6

3 0
3 years ago
Pula pays 419.92 for 2.4 pounds of walnuts .What is the price per pounof waluts ?
Troyanec [42]
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How I did it:
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Consider the original triangle and the reduction. What is the length of side A in centimeters?
strojnjashka [21]
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4 0
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A sphere is just enclosed inside a right circular cylinder. If the volume of the sphere is 140 cm3, find the volume of the gap b
alexgriva [62]
-----------------------------------------------------------
Find Radius :
-----------------------------------------------------------
\text {Volume of a sphere =}   \dfrac{4}{3}  \pi r^3

\dfrac{4}{3}  \pi r^3 = 140

\pi r^3 = 140 \times  \dfrac{3}{4}

\pi r^3 = 105

r^3 =  \dfrac{105}{ \pi}

r = 3.22 \ cm

-----------------------------------------------------------
Find volume of the cylinder :
-----------------------------------------------------------
\text {Volume of the cylinder = } \pi r^2h

\text {Volume of the cylinder = } \pi ((3.22)^2(3.22 \times 2)

\text {Volume of the cylinder = } 209.77 \ cm^3

-----------------------------------------------------------
Find volume of the gap :
-----------------------------------------------------------
\text {Volume of gap = } 209.77 - 140

\text {Volume of gap = } 69.77 \ cm^3

-----------------------------------------------------------
\bf \text {Answer : } 69.77 \cm^3
-----------------------------------------------------------

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Read 2 more answers
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