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3 years ago

Evaluate the expression 15+(9-6)

Mathematics

2 answers:

mestny [16]3 years ago

8 0

Answer:

Step-by-step explanation:

PEMDAS

parentheses

exponents

multiplication

division

addition

subtraction

15+(9-6)

15+3

Shalnov [3]3 years ago

6 0

Answer:

Step-by-step explanation:

You'd use order of operations - so you'd solve inside the parenthesis first.

15 + ( 9 - 6 )

15 + ( 3 )

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The ratio of boys to girls in the sixth grade is 2:3. If there are 80 boys, how many are girls? Solve using unit rates.

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Answer:n 80

Step-by-step explanation:

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3 years ago

Three friend went out to eat pizza. Their pizza costs 15.63 and drinks cost 1.29 each. Salad costs 2.45. If they plan to share t

Kobotan [32]

Answer:

Friend 1: $11.53 Frind 2: $5.21 Friend 3: $5.21

Step-by-step explanation:

15.63/3=5.21

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5.21+3.87+2.45=11.53

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3 years ago

Read 2 more answers

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nasty-shy [4]

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3 years ago

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4 0

3 years ago

Keeping in mind the rules for significant figures, determine how many milliliters there are in 0.073 gallons. 1 gallon = 4 quart

andreev551 [17]

we are given

there are in 0.073 gallons

we can see that there are two non-zero places after decimals

so, there are two siginificant figures

step-1: Change gallons to quarts

we know that

1 gallon = 4 quarts

so, we can write as

$0.073gallons=0.073*1gallon$

$0.073gallons=0.073*4quarts$

$0.073gallons=0.292quarts$

step-2: Change into liter

$0.073gallons=0.292quarts$

we know that

1 liter = 1.057 quarts

$1 quart=\frac{1}{1.057} litre$

$0.073gallons=0.292*1quarts$

$0.073gallons=0.292*\frac{1}{1.057} litre$

$0.073gallons=0.27625 litre$

step-3: Change into millilitre

we know that

$1L=1000mL$

$0.073gallons=0.27625*1 litre$

$0.073gallons=0.27625*1000 mL$

Since, it is asking for only two significant figures

so, we can also write as

$0.073gallons=0.28*1000 mL$

$0.073gallons=280 mL$ ...................Answer

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3 years ago