3 years ago

X/8 - 9 = 1 Solve for x

Mathematics

1 answer:

mestny [16]3 years ago

7 0

Answer:

x=80

Step-by-step explanation:

x/8-9=1
x/8=9+1
x/8=10
x=80

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Someone please help with parts a b c and d. I will mark brainlest!!!

maria [59]

Answer:

A. 49 feet

B. 66 feet (round to the nearest foot)

C. 4 seg

Step-by-step explanation:

A. What is the height of the ball after 3 seconds?

For $t=3 seg$

$h(3)=-16(3)^{2} +63(3)+4$

$h(3)=-144+189+4\\h(3)=-144+193\\h(3)=49 feet$

B. What is the maximum height of the ball? round to the nearest foot

$h(t)=-16(t)^{2} +63(t)+4\\h'(t)=-32(t) +63\\$

then

$-32(t)+63=0\\t=\frac{-63}{-32}\\t=1.969seg$

For $t=1.969seg$

$h(1.969)=-16(1.969)^{2}+63(1.969)+4\\h(1.969)= 66.016\\h(1.969)=66 feet$

C. When will the ball hit the ground?

The ball will hit the ground when $h(t)=0$

so, $-16t^{2} +63(t)+4=0$

Using the quadratic equation

$t=4seg$

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3 years ago

If (m-n)/n = 4/9 what is the value of n/m

Reil [10]

Just do cross multiplication to get the required answer: n/m=9/13

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2 years ago

What is 42/6 in simplest form

Sindrei [870]

$\frac{42}{6} =\frac{6\times7}{6\times1} =\frac{7}{1} =\boxed{\bf{7}}$

42/6 in simplest form is 7.

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2 years ago

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15. What's the correct letter name for Z1 below?

adoni [48]

D is the answer bro

Hit the thank button

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hoa [83]

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