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masya89 [10]
3 years ago
5

Multiple Choice 1. The sides of a triangle are in the ratio 3 : 4 : 5. What is the length of each side if the perimeter of the t

riangle is 90 cm? (1 point) A. 22.5 cm, 30 cm, and 37.5 cm B. 19.3 cm, 25.7 cm, and 32.1 cm C. 7.5 cm, 11.5 cm, and 32.1 cm D. 10.5 cm, 11.5 cm, and 12.5 cm 2. Is the following always, sometimes, or never true? 6 + 8x – 9 = 11x + 14 – 3x A. always true B. sometimes true C. never true 3. Solve the inequality. Graph the solution set. 5r + 4 ≤ 5
Mathematics
1 answer:
marishachu [46]3 years ago
4 0
3x + 4x + 5x = 12x
=\ \textgreater \  12x = 90
x = 90/12 = 15/2
3x = 3*(15/2) = 45/2 = 22.5 cm
4x = 4*(15/2) = 30 cm
5x = 5*(15/2) = 75/2 = 37.5 cm
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There are 20 pieces of fruit in a basket and 12 of them are oranges . what percentage of the pieces of fruit in the basket are o
natima [27]

Answer:

60% or 0.6

Step-by-step explanation:

Divide 12 by 20

12/20 = 0.6

Conversion to percentage

0.6 * 100 = 60%

7 0
2 years ago
box with a square base and open top must have a volume of 4,000 cm3. Find the dimensions of the box (in cm) that minimize the am
Naya [18.7K]

Answer:

Hence the width, length is 20 cm and height is 10 cm

Step-by-step explanation:

Since the box has a square base, let length = width = x. Also, let the height = y, therefore:

The volume of box = width * length * height

4000 = x * x * y

4000 = x²y

y=4000/x²

The surface area (SA) = area of the base + sum of the area of each side

SA = x² + xy + xy + xy + xy

SA = x² + 4xy

substitute y = 4000/x²

SA = x² + 4x(4000/x²)

SA = x² + 16000/x

Taking the derivative:

SA' = 2x - 16000/x²

making SA' = 0:

0 = 2x - 16000/x²

2x = 16000/x²

2x³ = 16000

x³ = 8000

x = 20 cm

y = 4000 / x² = 4000 / 20² = 10 cm

Hence the width, length is 20 cm and height is 10 cm

6 0
3 years ago
I need help please ​
Levart [38]
The correct answer is true:)
7 0
3 years ago
Read 2 more answers
Please Help!!!!!!
QveST [7]
It means you're putting money into your account
8 0
3 years ago
Read 2 more answers
GIVING OUT BRAINLIEST ANSWER !! HELP ME OUT PLSS!!
Karo-lina-s [1.5K]

Answer:

x = 7 hope this helps !!!

Step-by-step explanation:

Type 1: You know the short leg (the side across from the 30-degree angle). Double its length to find the hypotenuse. You can multiply the short side by the square root of 3 to find the long leg.

Type 2: You know the hypotenuse. Divide the hypotenuse by 2 to find the short side. Multiply this answer by the square root of 3 to find the long leg.

Type 3: You know the long leg (the side across from the 60-degree angle). Divide this side by the square root of 3 to find the short side. Double that figure to find the hypotenuse.

this is a type 3 triangle, and you can find the length of y from it, it being 14, and x is half of y, being 7

4 0
3 years ago
Read 2 more answers
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