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2 years ago

The perimeter of an equilateral triangle is 117mm. State the length of one of its sides.

Mathematics

1 answer:

alina1380 [7]2 years ago

5 0

Equilateral triangles have equal sides
117/3 = 39 mm. All the sides equal to
39 mm

Solution: 39mm

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a computer store bought a program at a cost of $20 and sold it at a selling price$26. what is the percent markup

tekilochka [14]

it would be a 6 percent mark up :)

8 0

2 years ago

1.) -9x+8 ≤ 80 * A. x ≥ -8 B. x ≤ -8 C. x ≥ 8 D. x ≤ 8

Firlakuza [10]

Answer:

$x\geq -8$

Step-by-step explanation:

$-9x+8\leq 80$

-8 -8

₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋

$\frac{-9x}{-9} \leq \frac{72}{-9}$

⇵

$x\geq -8$

7 0

2 years ago

Read 2 more answers

X + 5y - 10 = 0 x = 2y - 8

ipn [44]

So since we know what x is, we can substitute it into the original equation for x like so to solve for y...

(2y - 8) + 5y - 10 = 0
2y - 8 + 5y = 10
2y + 5y = 18
7y = 18
y = 18/7 (or about 2.57)

So now we know what x is, we can sub it into the below equation to solve for x...

x = 2(18/7) - 8
x = 36/14 - 8 (or about -5.43)

3 0

2 years ago

I need help on this question

Irina18 [472]

To find the surface area of the figure , we need to add the surface area of all the faces

So the surface area of figure = Area of two lateral rectangular faces + Area of two triangular faces + area of base

hence

Surface Area of figure = 2(10*15) + 2( 1/2 * 8 * 12) + (12*15)

= 300 + 96 + 180

= 576 square feet

So correct option is the last one

7 0

2 years ago

If you earned 892.50 after depositing 1400 at 4.25% simple interest, how long was it invested ? Using the simple interest formul

DanielleElmas [232]

Answer:

Time t = 15 years

Step-by-step explanation:

Interest = 892.50

Principal = 1400

Rate = 4.25%

Time = unknown

But

interest I = Principal p * rate r * time t

Time t = interest I/(principal P * rate r)

Time t=( 892.50*100)/(1400*4.25)

Time t=89250/5950

Time t = 15 years

4 0

2 years ago