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kaheart [24]
3 years ago
9

PLEASE HELP!!!

Mathematics
2 answers:
AfilCa [17]3 years ago
7 0
The answers must be B
Ivenika [448]3 years ago
5 0

Answer:

B

Step-by-step explanation:

(Standard form is automatically in integers)

Multiply by 3 to take out the fraction

3y=2x+21

-2x -2x

-2x+3y=21

Standard form means Ax+By=C with positive A (usually--some people allow A to be negative).

Multiply by (-1)

2x-3y=-21

(Technically, that's the more correct answer, but since you don't have that choices, it's just the previous one.)

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A computer sells for $610. It is now on sale for 1/5 off the original price. Derek has a coupon for an extra 10% off the sale pr
belka [17]

Derek will  pay $625.25 less than the original prize

<u>Step-by-step explanation:</u>

The selling price of the computer=$610

The selling prize is 1/5 of its original prize

Derek has a 10% off coupon

Let the original prize of the computer=x

selling prize=x-x/5

4x/5=610

4x=3050

x=3050/4=762.5

The\ prize\ at\ which\ Derek\ will\ buy\ the\ computer=x \times 1/5 \times (100-10)/100\\=x\times 1/5 \times 90/100\\=9x/50\\

the difference in the original prize and the prize at which Derek bought the computer=x-9x/50

=41x/50

41 \times 762.5/50\\=$625.25

Derek will pay $625.25 less than the original price for the computer.

8 0
3 years ago
May I please have help from anyone thank you so much !m
Sauron [17]

Answer:

Hello! answer: 512 cm3

Step-by-step explanation:

8 × 8 × 8 = 512 cm3

4 0
3 years ago
3/4x + 1/6= 7/8<br> Find X<br> I don’t know what to multiply it by
bazaltina [42]

1/6 x 4= 4/24=0.166

3/4 x 6= 18/24=0.75

7/8 x 3=21/24=0.875

0.875-0.75=0.125

0.125/0.17=0.74

5 0
3 years ago
Read 2 more answers
Bryson's little brother sleeps in a crib that is 3 feet wide and 5 feet long. What is the perimeter of the crib?
g100num [7]
The answer is 16 because 5(2) is 10 plus 3(2) which is 6 so 10+6 is 16
7 0
3 years ago
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What is the surface area to volume ratio of a 5 cm cube?
joja [24]
Answer: 6/5

Explanation:
Given: 5cm cube
This means each side is 5 cm because a cube has equal sides.

Area of a square is length times width so area of 1 side of a cube:
= 5 x 5
= 25

Surface area is the area of one side of a cube times the number of sides. Now, how many sides does a cube have? 6
= 25 x 6
= 150

Surface area of a 5cm cube = 150

Volume is length times width times height:
= 5 x 5 x 5
= 125

Ratio of surface area to volume:
= 150/125
= 6/5
6 0
3 years ago
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