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3 years ago

In the fraction 15⁄7, which of the following is 15?

Mathematics

1 answer:

Ket [755]3 years ago

3 0

The numerator. the number on top is always the numerator of a fraction.

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Select the correct answer.

Allushta [10]

Answer:

Step-by-step explanation:

3 0

3 years ago

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A ladder 10 feet long rests against a vertical wall. Initially, the top of the ladder is 8 feet above the ground. If the top of

lora16 [44]

Step-by-step explanation:

Let vertical height of ladder from ground be y and

horizontal distance of the base of the ladder from the wall be x respectively.

Length of the ladder = l (constant) = 10 ft

Using Pythagoras theorem:

${l}^{2} = {y}^{2} + {x}^{2}$

Differentiate both sides w.r.t time

$0 = 2y \frac{dy}{dt} + 2x \frac{dx}{dt}$

$y \frac{dy}{dt} + x \frac{dx}{dt} = 0$

We know that (After 1 sec, y = 6 ft and x = 8 ft ; dy/dt = 2 ft/sec)

$6\times 2 + 8\frac{dx}{dt} = 0$

$\frac{dx}{dt} = - 1.5 ft \: per \: sec$

( Ignore - ive sign)

Therefore, bottom of the ladder is sliding away from the wall at a speed of 1.5 ft/sec one second after the ladder starts sliding.

8 0

3 years ago

A hailstone falls from a cloud at a height of 1,600 ft. If the equation for height as a function of time is h(t) = -16t2 + initi

Helen [10]

Answer:

10 seconds

Step-by-step explanation:

The function is

$h(t)=-16t^2+\text{Initial height}$

Initial height = 1600 ft

t = Time taken

$0=-16t^2+1600$

$\Rightarrow -16t^2=-1600$

$\Rightarrow t^2=\dfrac{1600}{16}$

$\Rightarrow t^2=100\\\Rightarrow t=\pm 10$

So, time taken by the hailstone to reach the ground is $10\ \text{seconds}$ .

7 0

2 years ago

Please help How do you sove this step by step 3(x-5)=21

leonid [27]

3(x-5)=21
x-5=21/3
x-5=7
x=7+5
x=12

here is the answer.

7 0

3 years ago

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6,632 ÷ 6 help me please

Mila [183]

Answer:

1,105 with a remainder of 2

Step-by-step explanation:

without a remainder it would be 1105.33333333

8 0

2 years ago