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gulaghasi [49]
3 years ago
10

Subtract 4a-7ab+3b+12 from 12a-9ab+5b-3​

Mathematics
2 answers:
Tamiku [17]3 years ago
6 0

Answer:

8a - 2ab + 2b - 15

Step-by-step explanation:

(12a - 9ab + 5b - 3) - (4a - 7ab + 3b + 12)

(12a - 9ab + 5b - 3) - 4a + 7ab - 3b - 12

12a - 4a - 9ab + 7ab + 5b - 3b - 3 - 12

8a - 2ab + 2b - 15

viktelen [127]3 years ago
6 0

Answer:

8a - 2ab + 2b - 15

Step-by-step explanation:

12a-4a - 9ab--7ab + 5b-3b - 3-12

8a-2ab + 2b - 15

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Last one help. Use formulas to find the lateral area and surface area of the given prism. Round your answer to the nearest whole
Fed [463]
The formula for finding the lateral area for a triangular prism is
A_{L} = (a + b + c )h

So put in the values and you get

A_{L} = (12.04 + 9 + 8 )23
A_{L} = 668

The formula for finding the surface area of a triangular prism is
SA = bh + (s1 + s2 + s3)H

So put in all the values and you get

SA = 9(8) + (9 + 8 + 12.04)23
SA = 740

Hope this helps! :)
3 0
3 years ago
A rectangular yard is X feet wide. The yard is 4 feet longer than it is wide. The perimeter P of yard is given by the equation P
vladimir2022 [97]

Given:

Width of the rectangular yard = x feet

Length of the rectangular yard = x+4 feet

Perimeter of the rectangular yard is:

P=4x+8

Perimeter of the yard = 84 feet

To find:

The length of the rectangular yard.

Solution:

Perimeter of the yard is 84 feet.

4x+8=84

4x=84-8

4x=76

Divide both sides by 4.

x=\dfrac{76}{4}

x=19

So, the width of the rectangular yard is 19 feet.

Length = 19+4

Length = 23

The length of the rectangular field is 23 feet.

Therefore, the correct option is B.

6 0
3 years ago
Marsha gave the cashier $20 to pay for 3 pairs of socks. The cashier gave her $5.03 in change. Each pair of socks cost the same
allochka39001 [22]

Answer:

$4.99

Step-by-step explanation:

If she pays with $20 and recieves $5.03 in change, her total cost was 20 - 5.03 or $14.97. If each pair of socks is the same amount, 14.97 / 3 will give you the amount per each pair. 14.97 / 3 = $4.99

7 0
3 years ago
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Find the area of this figure<br> i will do more points next if i get NO incorrect or fake questions
V125BC [204]
The answer is 400 inches squared
5 0
3 years ago
Read 2 more answers
Someone pls help me :)
klasskru [66]

1.

25%

.3 + .2 + .15 + .1 = .75

1.00 - .75 = .25

2.

120 students

There are 400 total students

.3 * 400 = 120

4.

tennis-

.1 * 400 = 40 students prefer tennis

football-

.25 * 400 = 100 students prefer football

140 students like football/tennis

5.

400 students

There are four quarters in a whole

.25% = 100

100 * 4 = 400

4 0
3 years ago
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