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3 years ago

Make r the subject of the formula

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Mathematics

1 answer:

serg [7]3 years ago

4 0

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Find the measure of angle A. 71° x+49 +72

slega [8]

Answer: 66 degrees

Step-by-step explanation:

Sum of the angle measures is 180, so:

71 + x + 49 + x + 72 = 180

2x + 192 = 180

2x = -12

x = -6

Meaning the measure of angle A = -6 + 72 = 66 deg.

5 0

2 years ago

Help please I don’t know how to do this

Mashcka [7]

The correct answer is the last one
(0,-4)

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2 years ago

Picture below ..........................

masha68 [24]

Answer:

B) Multiply each side by 3

Step-by-step explanation:

This is how to solve for h

$\frac{h}{3}$ + 7 = 5 (First Step --> Subtract 7 from both sides)

$\frac{h}{3}$ = - 2 (Second Step --> Multiply both sides by 3 to cancel out the denominator and to find just h)

h = -6

6 0

3 years ago

Read 2 more answers

50 POINTS!!!!!WILL MARK BRAINLIEST IF YOU HELP GEOMETRY. LOOK AT PHOTO FOR QUESTIONS

ki77a [65]

Answer:

hmm a chicken

Step-by-step explanation:

6 0

3 years ago

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

$t=4seg$

6 0

3 years ago