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marin [14]
4 years ago
7

Combine like terms.9 + 18s – 7s a. 20s b. 9 + 11s c. 9 – 11s d. 20

Mathematics
1 answer:
Dmitry [639]4 years ago
5 0
9+ 18s -7s
= 9+ (18s -7s) (combine like terms)
= 9+ 11s

The correct answer is b. 9+ 11s.
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Please help me thanks
KiRa [710]

Answer:

1,2,4,5,10

1,2,3,5,6

60

Step-by-step explanation:

7 0
3 years ago
8) The perimeter of a rectangle is 20x2 + xy - 7y2 and one of it's sides is
Sedbober [7]

Answer:

3x^2 + 3xy/2 - 7xy^2/2

Step-by-step explanation:

So we know the perimeter is 20x^2 + xy - 7y^2,

To find any perimeter you need 2l + 2w = P so,

One of the sides is 7x^2 - xy

First plug in the values,

2(7x^2-xy) + 2w = 20x^2 + xy - 7y^2

Multiply,

14x^2-2xy + 2w = 20x^2 + xy - 7y^2

Subtract,

14x^2 - 2xy - 14x^2 + 2xy + 2w = 20x^2 + xy - 7y^2 - 14x^2 + 2xy

2w = 6x^2 + 3xy - 7y^2

w = 3x^2 + 3xy/2 - 7xy^2/2

5 0
3 years ago
Ahmed buys a house worth 268,000 pounds and its value rises at a compound rate of x% per year.
levacccp [35]
It would be .546% increase per year. You divide 292662.70 by 268000 and get 1.092025 and then divide by 2 for the years and get .546. Hope this helps
8 0
3 years ago
Cost of boots: $99.99 Markup: 9% What is the new cost
mote1985 [20]

Answer:

The new cost is $108.98

Step-by-step explanation:

Mark up is the amount that is added to cost price of a product for profit.

Given

Cost price of boots = C = $99.99

Mark up = 9%

First of all we will calculate markup and then add it to the cost price of boots to find the new cost.

Mark\ up = M = 9\%\ of\ 99.99\\= 0.09*99.99\\=\$8.99

The new cost will be:

C_n = Cost\ price + mark\ up\\C_n = 99.99+8.99\\= 108.98

The new cost is $108.98

6 0
3 years ago
Which expression is equivalent to –2(5x – 0.75)?
zzz [600]
-10x + 1.5 because you get rid of the parenthesis so -2 times 5 is -10 ( -10x ) and then -2 times -0.75 equals positive 1.5 due to two negatives canceling out to positive hope this helped!
4 0
3 years ago
Read 2 more answers
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