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4 years ago

A + (-25)=75 Solve the equation

1 answer:

5 0

You can rewrite this as A - 25 = 75. You always can cancel adding a negative into just subtracting, and although it may not seem important yet, it’s a good habit to get into for further algebra.
A = 100.

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Factor the polynomial expression 8x^3-1

Nataliya [291]

Answer:

Step-by-step explanation:

6 0

3 years ago

Dori bought a sandwich for $6.75, a bag of dried fruit for $1.45 and a bottle of water for $1.75. She paid the cashier with a $2

Len [333]

Answer:

She would receive $10.05 cents back

Step-by-step explanation:

Add 6.75, 1.45, and 1.75. You would get 9.95. Then, you would subtract $20.00 by $9.95, getting 10.05 as change.

Hope this helps!

5 0

3 years ago

Type the correct answer in each box. Alan, Bill, and Calvin are playing a game with collectible cards. At the moment, Alan has 1

steposvetlana [31]

Let A be the number of cards Alan has

B be the number of cards Bill has

C be the number of cards Calvin has

Alan had 11 less than 2 1/2 times the number of cards bill has.

is 2.5

Alan is 2.5 of bill has minus 11

A=2.5B -11

Calvin has 1 more than 1 1/2 times the number of cards bill has.

is 1.5

Calvin is 1.5 of bill has plus 1

C=1.5B + 1

Alan and Calvin have the same number of cards

So A=C

WE plug in A and C equations and solve for B

2.5B -11 = 1.5B + 1 (subtract 1.5B on both sides)

1B -11 = 1 (Add 11 on both sides)

B = 12

If Alan and Calvin have the same number of cards, the number bill has is 12

The number of cards Alan and Calvin each have is 19

Total cards = 12 + 19 + 19 = 50

If Alan, bill, and Calvin have all the cards in the deck then the deck has 50 cards

6 0

3 years ago

Read 2 more answers

A frame is 15 in by 25 in and is of uniform width. The inside of the frame leaves 75% of the total area available for the pictur

Alexxx [7]

Answer:

1.253 inches

Step-by-step explanation:

5 0

3 years ago

The standard deviation for a set of data is 7.5. The mean is 235. What is the margin of error?

blondinia [14]

The margin of error is 0.97849

we are given

mean=235

so,

$n=235$

standard deviation =7.5

so,

$\sigma=7.5$

we know that

ME=2*standard error

and

$SE=\frac{\sigma }{\sqrt{n} }$

If confidence level is 95%, then we can multiply by 1.96

so, we can multiply by 2 to get ME

now, we can use marginal error formula

$ME=\frac{2\sigma }{\sqrt{n} }$

now, we can plug values

and we get

$ME=\frac{2\times 7.5 }{\sqrt{235} }$

$ME=0.97849$

7 0

3 years ago

Read 2 more answers