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2 years ago

I need help on the math question!

Mathematics

1 answer:

TEA [102]2 years ago

6 0

Answer:

3 and 7

Step-by-step explanation:

You know from your multiplication tables that ...

21 = 1×21 = 3×7

There are no other factorizations of 21 using integers. You may notice that the sums of these factors are ...

1+21 = 22

3+7 = 10 . . . . . . this is the pair of numbers you are looking for

The two numbers are 3 and 7.

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Ann, Ben, and Cindy were eating strawberries. The ratio of the numbers of berries they ate is 5:5:7. If Cindy ate 30 strawberrie

agasfer [191]

Answer:

170

Step-by-step explanation:

Ann, Ben, and Cindy were eating strawberries.

The ratio of the numbers of berries they ate is 5:5:7.

If Cindy ate 30 strawberries less than Ann and Ben together,

find:

what is the total number of strawberries the three of them ate?

solution:

add the ratios 5 + 5 + 7 = 17

since Cindy ate 30, less than Ann and Ben together so, the equation is

7x = 5x + 5x - 30

7x - 10x = -30

x = 30/3

x = 10

ann 5 x 10 = 50

ben 5 x 10 = 50

cindy 7 x 10 = 70

total = 170

7 0

3 years ago

Pamela drove her car 99 kilometers and used 9 liters of fuel. She wants to know how many kilometers (k) she can drive with 12 li

masya89 [10]

Answer:

132 kilometers

Step-by-step explanation:

Given: Pamela drove her car 99 kilometers and used 9 liters of fuel.

To find: Number of kilometers Pamela drove in 12 liters of fuel.

Solution:

It is given that Pamela drove her car 99 kilometers and used 9 liters of fuel. Also the relationship between kilometers and fuel is proportional.

So, let us assume that she can travel x kilometers in 12 liters of fuel.

By proportionality we have,

$99:9 :: x:12$

$\frac{99}{9} =\frac{x}{12}$

$11=\frac{x}{12}$

$x=12\times11$

$x=132$

Hence, she can travel 132 kilometers in 12 liters of petrol.

7 0

3 years ago

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In a family with 77 children, excluding multiple births, what is the probability of having exactly 22 girls

Lemur [1.5K]

Answer:

22/77

Step-by-step explanation:

just put the probable amount over the total amount for these

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2 years ago

What is the factored form of x^2y^3 -2y^3 - 2x^2 +4

Law Incorporation [45]

(-x^2+4)

x^2y^3-2y^3-2x^2+4=x^2-2x^2+4=

(-x^2+4)

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3 years ago

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Elden [556K]

Answer:

You got it! ill do it now

Step-by-step explanation:

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3 years ago

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