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saw5 [17]
3 years ago
12

Alvin incorrectly simplified 4 x 42 and got an answer of 166.

Mathematics
1 answer:
kirza4 [7]3 years ago
7 0

the answer is 168

Step-by-step explanation:

you times 4 by 2 you get 8.

now you got to times 4 by 40 and you get 160

now you add 8 to 160 you will get 168

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irina [24]
 8x-6y=-96  add to this -4 times the second equation...
-8x-12y=-48
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-18y=-144

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8x=-48

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3 0
3 years ago
An engineer is trying to design a runway for an airport. He knows that airplanes have the ability to accelerate at 3.3 m/s ^ 2 a
chubhunter [2.5K]

Answer:

The proposed 1600 meters runway length is not long enough

Step-by-step explanation:

The given parameters are;

The amount by which a plane can accelerate = 3.3 m/s²

The time it takes for a plane to lift off the ground = 35 seconds

The length of the runway on the blueprint = 1,600 meters

Therefore, from the equation of motion for distance traveled, s, acceleration, a, and time taken, t, we have;

s = u·t + 1/2·a·t²

Where;

u = The initial velocity

t = 35 seconds

a = 3.3 m/s²

Given that all planes will start motion from rest, we have;

u = 0 m/s

Therefore;

s = 0 × 35 + 1/2 × 3.3 × 35² = 2021.25 meters

Which indicates that the length of the runway a plane would need for take off should be at least 2021.25 meters long, therefore, the blueprint's 1600 meters runway length is not long enough.

7 0
4 years ago
5.
Fiesta28 [93]
A.) 135 miles in 3 hours = 45 miles per hr

B.) 22 miles in 1 hour= 22 miles per hr

C.) 7.5 miles in 1/4 hour = 30 miles per hr

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E.) 97.5 in 1.5 hours = 65 miles per hr
4 0
3 years ago
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The answer is D. The law of detachment states that
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4 0
3 years ago
Let f(x)=-2-7 and g(x)= -4x+6. Find (f*g)(-5)
Masja [62]
If (-5) = x then the anwser should be
-234

5 0
3 years ago
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