3 years ago

1. (MC)

Mathematics

1 answer:

Arada [10]3 years ago

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The total cost of 5 pencils and 1 protractor which costs $3.00 is twice the total cost of 3 pencils and 2 erasers that each cost

Stolb23 [73]

Answer:1.73$ per pencile

Step-by-step explanation:

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2 years ago

Please help I’m struggling on this question.

timofeeve [1]

Answer: $\frac{2(y^2-4y+40)}{(y-8)(y+4)}$

Step-by-step explanation:

To solve this problem, we want to make sure the denominators are the same on both fractions. Once they are equal, we can dd them together.

$\frac{y+4}{y-8} +\frac{y-8}{y+4}$ [multiply first fraction by y+4 and second by y-8]

$\frac{(y+4)(y+4)}{(y-8)(y+4)} +\frac{(y-8)(y-8)}{(y-8)(y+4)}$ [distribute by FOIL]

$\frac{y^2+8y+16}{(y-8)(y+4)} +\frac{y^2-16y+64}{(y-8)(y+4)}$ [add numerator]

$\frac{y^2+8y+16+y^2-16y+64}{(y-8)(y+4)}$ [combine like terms]

$\frac{2y^2-8y+80}{(y-8)(y+4)}$ [factor out 2 from numerator]

$\frac{2(y^2-4y+40)}{(y-8)(y+4)}$

Now we know that $\frac{2(y^2-4y+40)}{(y-8)(y+4)}$ is the factored form after adding.

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3 years ago

57 59° A 61 670 В' B n A What is the measure of

nydimaria [60]

Answer:

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4 years ago

Read 2 more answers

Write the standard form for the scientific notation. please help fast!!!

jarptica [38.1K]

$2.32\cdot10^3=2.32\cdot1,000=2,320\\\\4.2\cdot10^4=4.2\cdot10,000=42,000\\\\4.2\cdot10^{-2}=4.2\cdot0.01=0.042$

Multiplication by 10ⁿ → move decimal n places to the right.

Multiplication by 10⁻ⁿ → move decimal n places to the left.

For n ∈ N

6 0

3 years ago

What is the circumference of a circle when the diameter is 34

lilavasa [31]

Answer:

the circumference is C = 34π units.

Step-by-step explanation:

The circumference of a circle of diameter d is C = πd.

Here the diameter is 34 units. Thus, the circumference is C = 34π units.

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3 years ago