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3 years ago

Piggy Bank

Mathematics

1 answer:

aliya0001 [1]3 years ago

4 0

Answer:

see the explanation

Step-by-step explanation:

The correct question in the attached figure

Let

q ----> the number of quarter coins in the piggy

d ----> the number of dollar bills in the piggy

we have

$5q=d$ ----> equation A

$8q+d=91$ ----> equation B

Solve the system by substitution

substitute the value of d of equation A in equation B

$8q+(5q)=91$

solve for q

combine like terms

$13q=91$

divide by 13 both sides

$q=7$

Find the value of d

$d=5(7)=35$

therefore

The number of quarter coins in the piggy is 7 and the number of dollar bills in the piggy is 35

The total value in the piggy is

$\$0.25(7)+\$35=\$36.75$

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Ostrovityanka [42]

Answer:

Step-by-step explanation:

∠A and ∠B being complementary means m∠A + m∠B = 90°

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7x = 70

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Answer:

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4 years ago

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Katena32 [7]

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3 years ago

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$sam's\:mother\:is\:twice\:as\:old\:as\:sam.\:in\:12\:years\:sam\:will\:be\:as\:old\:as\:his\:mother\:was\:12\:years\:ago.\:how\

Furkat [3]

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Answer:

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Step-by-step explanation:

We can let x and y represent Sam's age and his mom's age, respectively.

y = 2x . . . . . Mom is twice Sam's age

y -12 = x + 12 . . . . Mom's age 12 years ago is the same as Sam's age 12 years from now

Substituting for y in the second equation, we have ...

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Therefore, bag contains 10^4 grams of sand.

Therefore, number of grains of sand are in the bag of sand of 10^4 grams =

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3 years ago