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3 years ago

Simplify (-9)-(9)(-3)-(8)(-7)

Mathematics

2 answers:

Oliga [24]3 years ago

7 0

The answer is 74. The parenthesis is another way of telling you to multiply.

maksim [4K]3 years ago

7 0

The first step to solving this expression is to remove the first set of parenthesis and then remove the parenthesis from all positive numbers.
-9 - 9 × (-3) - 8 × (-7)
Multiply the numbers -9 and (-3) together.
-9 + 27 - 8 × (-7)
Multiply the numbers -8 and (-7) together.
-9 + 27 + 56
Lastly,, use addition and subtraction rules to calculate the expression and find your final answer.
74.
This means that the final answer to your expression is 74.
Let me know if you have any further questions
:)

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Find the cost of 20 grams of lead at 60$ per kilogram

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Answer:

$1.20

Step-by-step explanation:

Ratio:

Grams : Kilograms

1 : .001

Multiply both sides by 20 to convert grams to kilograms:

Grams : Kilograms

1 : .001

x20 x20

20 : .02

This means that 20 grams of lead = .02 kilograms of lead

Price:

Cost : Kilogram

$60 : 1

Multiply both sides by .02 to find the price of the lead:

Cost : Kilogram

$60 : 1

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Therefore, .02 kg of lead costs $1.20.

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3 years ago

Help

marissa [1.9K]

The answer is 188 altogether

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3 years ago

Read 2 more answers

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lidiya [134]

Answer:

$4\frac{3}{8}$ yards of wood

Step-by-step explanation:

The correct question is Hakim is making birdhouses. Each birdhouse uses 7 /8 yard of wood. What is the total length of wood Hakim will need to build 5 birdhouses?

Answer: Given that the amount of wood need to produce one bird house is 7/8 yard, for 5 birdhouse, the amount of wood needed would be 5 times the number needed for one birdhouse. It is given by:

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