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2 years ago

5

PLEASE ANSWER! 15 POINTS

1 answer:

Vikentia [17]2 years ago

4 0

Answer: 13/15

Step-by-step explanation:

1/5 + 2/3 = 13/15. Since 13/15 can’t be simplified, that’s your answer.

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Rewrite the expression ”h8”

IceJOKER [234]

Answer:

h x 8

Step-by-step explanation:

when there is no sign in between that means to multiply

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2 years ago

The local park has 4 bike racks. Each bike rack can hold 15 bikes. There are 16 bikes in the bike racks. What expression shows t

Eva8 [605]

answer ---> y =15×4-16

15×4=60

60-16=44

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2 years ago

Look at the question below.

MissTica

Answer:

I think is is 2(x+12)

Step-by-step explanation:

two times x and 12, so 2(x+12)

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2 years ago

Find 3 consecutive even integers such that twice the 3rd is 4 more than triple the 1st

RoseWind [281]

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5 0

2 years ago

Dave throws sweets upwards at a speed of 8ms^-1 from a first floor window to his sister Carol who is standing at a second floor

olga55 [171]

It would take $1 second$ for Carol to catch the sweet after Dave threw it.

Let

$h=\text{maximum height}\\y=\text{distance from maximum height to Carol}\\t_h=\text{time taken to reach maximum height}\\t_y=\text{time taken to fall from maximum height to Carol}$

we want to calculate the value $t_h+t_y$

First, we have to calculate $t_h$ using the formula

$v=u+at$

using $v=0$ , $u=8$ , $a=-10$ (the sweets are decelerating due to gravity!)

$0=8-(10)t_h\\10t_h=8\\t_h=\frac{8}{10}=0.8seconds$

To calculate $t_y$ , first calculate $h$ , then $y$ . Using the formula

$h=ut+\frac{1}{2}at^2$

and the values $u=8$ , $t=t_h=0.8$ , $a=-10$ (again, the sweets are decelerating to get to maximum height)

$h=(8)(0.8)+\frac{1}{2}(-10)(0.8)^2\\\\=6.4-3.2\\=3.2m$

since, Carol is standing $3m$ above Dave, we have the relationship

$h=y+3$

so that

$y=h-3\\=3.2-3\\=0.2m$

we can now calculate $t_y$ ;

$y=ut_y+\frac{1}{2}gt_y^2$

taking $y=0.2$ , $u=0$ , $g=10$ (the sweets are falling, so they are now accelerating)

$0.2=(0)t_y+\frac{1}{2}(10)t_y^2\\\\0.2=5t_y^2\\t_y^2=0.04\\\implies t_y=0.2seconds$

So it would take

$t_h+t_y=0.8+0.2=1.0seconds$

for Carol to catch the sweet after Dave threw it from the first floor.

Learn more here: brainly.com/question/84352

7 0

2 years ago