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3 years ago

Granny had 25 bananas.

Mathematics

2 answers:

Flauer [41]3 years ago

8 0

Answer:

Step-by-step explanation:

because 9 types 3 =27.

granny only has 25 bananas, so she is 2 bananas short.

Ede4ka [16]3 years ago

7 0

Answer:

Step-by-step explanation:

She needs 3 bananas for each loaf of banana bread.

She needs 3*9=27 bananas for 9 loaves.

She has only 25, she is 2 bananas short

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How to solve the question

Scorpion4ik [409]

You have the equations set up correctly. I will use r and b as the variables to make it easier to follow.

12r + 8b = 70
20r + 12b = 110

First let's solve one of the equations for one of the variables.

12r = 70 - 8b

$r = \frac{70-8b}{12}$

Now plug that in for r in the second equation.

$20( \frac{70-8b}{12})+12b = 110$

Simplify

$20(70-8b)+144b=1320$

$1400-160b+144b=1320$

$-16b = -80$

b = 5 grams

Now plug 5 in for b in one of the original equations to find r.

12r + 8(5) = 70

12r = 30

r = 2.5 grams

So the red marbles weigh 2.5 grams, and the blue marbles weigh 5 grams.

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3 years ago

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murzikaleks [220]

Answer:

Step-by-step explanation:

a=-2.9

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3 years ago

You want to buy a new winter coat that originally costs $115. The coat was marked down to $86.25 so you bought it. What percent

romanna [79]

Answer:

Step-by-step explanation:

The regular price is $62.50.

Explanation:

If the sale price is $50, and the sale is 20% off, that means the $50 represents the other 80% of the regular price—the part that you do pay. So then we ask ourselves, okay, $50 is 80 percent of... what? In math speak, that would be written as

$50(is)80%(of)(regular price)

$50=80% × r

Solving this for r, we get

r=$5080%

We remind ourselves that the "percentage" symbol is just a shorthand for "divide this number by 100." The equation becomes

r=$5080/100=$500.8=$62.50

So the regular price is $62.50.

Bonus:

A general formula can be used for any regular price r, any percent discount p, and any sale price s:

p%off of reg.price is sale price

(100−p)%× r = s

As long as we know two of the three variables {p,r,s}, we can solve for the third one.

Learn more : brainly.com/question/tcs1299821

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3 years ago

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Find f(3) for f(x)=1/2(4)^x. O A. 32 O B. 64 O c. 6 6 O D. 8

Natasha_Volkova [10]

Answer:

A) 32

Step-by-step explanation:

f(3)=1/2(4)^(3)

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