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d1i1m1o1n [39]
3 years ago
14

In a jar, 25% of the marbles are red. If there are 45 red marbles in the jar, how many marbles are in the jar altogether?

Mathematics
2 answers:
Oxana [17]3 years ago
8 0

Answer:

There are 180 marbles in the jar

Step-by-step explanation:

Let x = number of marbles in the jar

x * 25% = number of red marbles

x * .25 = 45

Divide each side by .25

x *.25/.25 = 45/.25

x =180

There are 180 marbles in the jar

salantis [7]3 years ago
8 0

Answer:

Answer: 180 marbles

Step-by-step explanation:

25 percent can be converted to 1/4 and 4 x 1/4 = 1 and/or whole

Now since 45 marbles = 25 percent/1 /4 of WHAT is in the jar now we can multiple 45 x 4 (times 4 to make the 1/4 into a whole) which gives up 180 marbles total.

Hopefully I explained it in a way you can understand

Hope this helped

Step-by-step explanation:

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Answer:

2(4x− 9) = 5(x − 4)

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Answer:

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Step-by-step explanation:

First, combine like terms on the left side

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5 0
4 years ago
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1 /3 − (−1 /5 ) <br><br> a. -1/2<br> b. 1/4<br> c. 2/15<br> d. 8/15
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Step-by-step explanation:


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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

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