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2 years ago

Evaluate the expression 6^2-(8–4^2+7

Mathematics

2 answers:

miskamm [114]2 years ago

7 0

please mark this answer as brainlist

stira [4]2 years ago

6 0

Hi there!

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I believe your answer is:

»»————-　★　————-««

Here’s why:

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$6^2 - (8-4)^2+7\\\rule{150}{0.5}\\\rightarrow 6^2 - (4)^2 + 7\\\\\rightarrow 36 - 16+7\\\\\rightarrow 20 + 7\\\\\rightarrow \boxed{27}$

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Hope this helps you. I apologize if it’s incorrect.

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Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon

Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

h(t) ----> he height of the ball, in feet

we have

$h(t)=-16t^2+40t+5$

we know that

When the ball hits the ground, the height is equal to zero

$-16t^2+40t+5=0$

The formula to solve a quadratic equation of the form

$at^{2} +bt+c=0$

is equal to

$t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^2+40t+5=0$

$a=-16\\b=40\\c=5$

substitute in the formula

$t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}$

$t=\frac{-40\pm\sqrt{1,920}} {-32}$

$t=\frac{-40+\sqrt{1,920}} {-32}=-0.12\ sec$

$t=\frac{-40-\sqrt{1,920}} {-32}=2.62\ sec$

therefore

The solution is t=2.62 seconds

4 0

2 years ago

I need help please ill give brainlist

Natalka [10]

Answer:

Banana

Step-by-step explanation:

So, First you multiply the Banana, next you take that Banana and eat it. After, find out the answer! Boom, done!

6 0

2 years ago

What is the slope of the line that passes through the points (-10, -8)(−10,−8) and (-8, -16) ?(−8,−16)? Write your answer in sim

photoshop1234 [79]

The slope of the line that passes through points ( -10, -8 ) and ( -8, -16 ) is -4.

<u>Explanation:</u>

Points given = ( -10, -8) and ( -8, -16)

Slope = ?

( -10, -8 ) : x1 = -10 and y1 = -8

( -8, -16 ) : x2 = -8 and y2 = -16

We know,

slope = y2 - y1 / x2 - x1

Slope = -16 - ( -8) / -8 - (-10)

slope = -16 + 8 / -8 + 10

slope = -8 / 2

slope = -4

Therefore, slope of the line that passes through points ( -10, -8 ) and ( -8, -16 ) is -4.

3 0

3 years ago

Help please answer really quick. I really need help. ( Math )

EleoNora [17]

Answer:

0.25 lbs

<h3>Explanation </h3>

You can translate the 1/2 a pound into 0.5lbs, which is equivalent. Then, this is the easier part. Sarah divides the clay into <u>t</u><u>w</u><u>o</u> equal pieces. This is asking you to halve 0.5lbs. The answer being 0.25lbs

5 0

3 years ago

QUICK QUICK QUICK QUICK I NEED ALL YOUR ANSWERS NOW UNDER 2 MINUTES ANSWER FIRST AND YOU WILL GET THE CHANCE TO BE THE BRAINLIES

juin [17]

Answer:

2 20/24

Step-by-step explanation:

divide 4/2=2

then do 5/8÷3/4=5/8×4/3=20/24

u basically inverse 3/4

2 20/24

7 0

3 years ago