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myrzilka [38]
2 years ago
15

PLz help me! We r doing semester finals and i need to get this lesson finished in 2 hours so i can get my grade up!

Mathematics
1 answer:
Leto [7]2 years ago
6 0

Answer:

$84

Step-by-step explanation:

1. If 20% is marked off, then you are selling it for 80%.

2. 455 * 80% = 364

3. Since you are finding the cost markup from 280, then 364-280=84

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Can i have some help i need to find the surface area​
makkiz [27]

Answer:

644ft^2

Step-by-step explanation:

Area of triangle=1/2bh

Area of square=l*l

so we have;

4 triangles with a base of 14ft and height of 16ft and 1 square with l=14ft

AreaTriangle=1/2(14ft)(16ft)=112ft*4=448ft^2

AreaSquare=14ft*14ft=196ft^2

Area Total=448ft+196ft=644ft^2

7 0
3 years ago
Helpp please!! 10 points
Zolol [24]
Slope is 1.3

take your 2 points and make a triangle, then count the small boxes to the point in the middle where they met. ( REMEMBER THE X&Y RULES)
you should get 4/3, you need to divide and put it into decimal form.
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8 0
3 years ago
6 is what percent of 8?
kvasek [131]
6 is 75% of 8. 6/8 can be simplified to 3/4, which is easier to see as 75%.
8 0
3 years ago
The measure of an angle is 2.8.what is the measure of its complementary angle
german

Answer:

87.2º

Step-by-step explanation:

Complimentary angles total 90º

c + 2.8 = 90

c = 90 - 2.8

c = 87.2º

3 0
3 years ago
Read 2 more answers
What is the sum of the polynomials?
Nadya [2.5K]

For this case we have the following polynomials:

-x ^ 2 + 9\\-3x ^ 2 - 11x + 4

Adding the polynomials we have:

(-x ^ 2 + 9) + (-3x ^ 2 - 11x + 4)

Rewriting we have:

x ^ 2 (-1-3) - 11x + (9 + 4)

Therefore, the result of the sum is:

-4x ^ 2 - 11x + 13

Answer:

the sum of the polynomials is:

-4x ^ 2 - 11x + 13

option 2

6 0
2 years ago
Read 2 more answers
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