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abruzzese [7]
3 years ago
13

-8r –9 > -21...............

Mathematics
1 answer:
Lesechka [4]3 years ago
6 0

Answer:

r < 3/2 or r < 1.5

Step-by-step explanation:

-8r - 9 > 21

-8r > -21 +9

-8r > -12

divide both sides by -8

= r < 3/2 or 1.5

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Which is steeper: a road with a 12% grade or a road with a pitch of 1 in 8?
11Alexandr11 [23.1K]

Answer:

A road with a pitch of 1 in 8 is steeper.

Step-by-step explanation:

Let us convert these to the same units so that we can better compare them.

\frac{1}{8} = 0.125

0.125=12.5 %

As 12.5% is greater than 12%, the road with a pitch of 1 in 8 will be steeper.

7 0
3 years ago
5/6 divided by 3????? Pls help
Oduvanchick [21]
5/6 divided by 3/1

5/6 *1/3
5/18
6 0
3 years ago
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Evaluate the function rule for the given value f(x)=15x for x=3
lesya692 [45]

Answer:

f(3) = 45

Step-by-step explanation:

Substitute x = 3 into f(x) and evaluate

f(3) = 15 × 3 = 45

7 0
3 years ago
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The sum of all lengths of polygon
alexdok [17]
I think the answer is The perimeter!
8 0
3 years ago
Find the surface area of the right triangular prism (above) using its net (below).
lakkis [162]

Answer:

144 units²

Step-by-step explanation:

The net of the right triangular prism consists of 3 rectangles and 2 equal triangles

Let's solve for the area of each:

✔️Area of rectangle 1 = L*W

L = 11

W = 3

Area of rectangle 1 = 11*3 = 33 units²

✔️Area of rectangle 2 = L*W

L = 11

W = 4

Area of rectangle 2 = 11*4 = 44 units²

✔️Area of rectangle 3 = L*W

L = 11

W = 5

Area of rectangle 3 = 11*5 = 55 units²

✔️Area of the two triangles = 2(½*base*height)

base = 4

height = 3

Area of the two traingles = 2(½*4*3)

= 12 units²

✔️Surface area of the right triangle = area of rectangle 1 + area of rectangle 2 + area of rectangle 3 + area of the two triangles

= 33 + 44 + 55 + 12

= 144 units²

7 0
2 years ago
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