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kap26 [50]
2 years ago
11

harry got 42 and 49 correct on his test what fraction of the marks did he get wrong give your answer in it simplest form ​

Mathematics
1 answer:
Nuetrik [128]2 years ago
4 0

Answer:

1/7

Step-by-step explanation:

49-42= 7

7/49 can be simplified by dividing by 7

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A diver dives from a 10m springboard. the equation f(t) = -4.9t² + 4t + 10 models her height above the pool at time t. When will
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Answer:

At time t = 0.408 sec diver will be at maximum height

Step-by-step explanation:

We have given equation of the height f(t)=-4.9t^2+4t+9

We know that velocity is the rate of change of distance with respect to time

So v=\frac{df(t)}{dt}=\frac{df(-4.9t^2+4t+10)}{dt}=-9.8t+4+0=-9.8t+4

At maximum height velocity will be zero

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t = 0.408 sec

So at time t = 0.408 sec diver will be at maximum height

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Adding and subtracting complex numbers question
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If m 2 n, which inequalities must be true? Check all that apply.
anzhelika [568]

Answer:

(a)\ m+ 2.1 > n + 2.1

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Step-by-step explanation:

Given

m > n

Required

Select true inequalities

(a)\ m+ 2.1 > n + 2.1

Subtract 2.1 from both sides

m > n

This is true

(b).\ m - (-4) > n - (-4)

Open brackets

m + 4 > n + 4

Subtract 4 from both sides

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m> -9+6 + n

m> n-3

This is also true

8 0
2 years ago
Read 2 more answers
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