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Svetlanka [38]
3 years ago
9

Amy earned $25 after babysitting for 3 hours. If she always charges the same rate, how many will she make after working for 7 ho

urs

Mathematics
1 answer:
Sidana [21]3 years ago
8 0
The answer is 7×3 =........

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An object is 3.6 m from the pinhole. Its image is 4.2 cm from the opposite side of the pinhole. The height of the image is 0.8 c
madreJ [45]

Answer:

Height of the object is 68.6 cm.

Step-by-step explanation:

The height of the object can be determined by:

\frac{object distance from pinhole}{image distance from pinhole} = \frac{object height}{image height}

From the given question;

object distance from pinhole = 3.6 m = 360 cm

image distance from pinhole = 4.2 cm

height of image = 0.8 cm

So that;

\frac{360}{4.2} = \frac{object height}{0.8}

⇒ object height = \frac{360*0.8}{4.2}

                           = \frac{288}{4.2}

                           = 68.571

object height = 68.6 cm

Thus, the height of the object is 68.6 cm.

5 0
3 years ago
Determine how much money you will have after 8 years if you invest 4,000$ at 7% compounded monthly
Solnce55 [7]
You would get $26,880.
0.07*4000= 280; so $280 are added every month
There are 96 months in 8 years, so multiply 280*96 which =26,880
7 0
3 years ago
Derrick earned 1472 during the 4 weeks he had his summer job. If he earned the same amount each week, how much did he earn each
Agata [3.3K]
368 he earned each week.

During the 4 weeks he earned 1472, to be able to know the amount he earn each week. We simply, divide 1472 into 4 because in a month there are 4 weeks. In dividing,1472/4 = 368. The above answer is correct.
5 0
3 years ago
Read 2 more answers
3x + 8y - 36=0
EastWind [94]

Answer:

<u>x = 10</u>

Step-by-step explanation:

3x + 8y - 36 = 0  ( <em>given</em> )

3x + 8y = 36        ( <em>change sides of 36</em> )

3x + 8 ( 3 / 4) = 36  ( implementing the value of y which is given )

3x -  2 * 3 = 36       ( <em>8 * 3 / 4 = 2 * 3</em>)

3x - 6 = 36

3x = 36 -6

3x = 30

 x = 30 / 3

<u>  x = 10 </u>

therefore the coordinates will be (10,3/4)

7 0
3 years ago
A water tank hols 540 galloms but is leaking at a rate of 4 gallons per week a second water tank holds 720 gallons but is leakin
Murrr4er [49]
Let after n week both tanks have same quantity of water .

for first tank
=============
tank hold 540 gallon of water ,
leaking of water 4 gallon /week
so, in n week water leak from the tank =4× n = 4n

now, after n week quantity of water in the tank = 540 -4n

for second tank
==============
quantity of water in the tank =720 gallon
leaking of water at the rate = 7gallon/week
so, after n week water leak from the tank = 7× n =7n

after n week quantity of water rest in the tank = 720 -7n

now ,
according to question ,

water in first tank = water in second tank
540 -4n = 720 -7n

7n -4n = 720 -540

3n = 180

n = 60

hence , after 60 week both tank have same quantity of water.
4 0
4 years ago
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