2 years ago

Please help!!! Answer ASAP and show work!!!

Mathematics

1 answer:

n200080 [17]2 years ago

4 0

Answer:

B and C. can you select more than one?

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The area of a compact disc is 78.53 square centimeters. What is the radius of the disc? Use pi = 3.14

Tom [10]

Answer:

r = 5 cm

Step-by-step explanation:

A = πr²

78.53 = (3.14)r²

divide by 3.14

25 = r²

r = ±5

r = 5

5 0

2 years ago

What value of n makes this expression equal to 6?<br><br> 3n - (2 + n)

SVEN [57.7K]

Answer:

Step-by-step explanation:

3n-2-n=6

2n-2=6

2n=8

n=4

5 0

2 years ago

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Tina is attempting to factor the expression 10x^2-13-3. In her first step, she rewrites the expression as 10x^2-10x-3x-3. Which

Setler79 [48]

ANSWER

B. The two middle coefficients add to the correct number but do not multiply to the correct number.

EXPLANATION

The given quadratic trinomial that Tina tries to factor is

$10 {x}^{2} - 13x - 3$

Comparing to

$a{x}^{2} + bx + c$

we have a=10, b=-13 and c=-3

ac=-3×10=-30

We split the middle term so that their sum is -13.

Tina use

-10,-3

to get

-10x-3x

The sum is -13x alright but the product is not -30.

B is correct.

8 0

2 years ago

You work for a carpet company. You sell carpets at these prices: 100 square feet for $67, 200 square feet for $130, 400 square f

GrogVix [38]

Answer:

Step-by-step explanation:

first one : 67/100 = .67 per sq feet

Second one: 130/200 = .65 per sq feet

Third one 240/400 = .6 per sq feet

Fourth one: 504/800 .63 per sq feet

so C is the best deal (C.

400 square feet of carpet for $240)

4 0

2 years ago

If 4 candies cost 25 cents, how much does it cost t buy 20 candies?

anastassius [24]

Answer:

5.00

Step-by-step explanation:

answer

3 0

2 years ago

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