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2 years ago

You advance 3 levels in 15 minutes. Your friend advances 5 levels in 20 minutes. Are these rates proportional? Explain.

Mathematics

2 answers:

katen-ka-za [31]2 years ago

8 0

Answer:

No those rates are not proportionate

Step-by-step explanation:

15 divided by 3 = 5

20 divided by 5 = 4

Therefor proving that it took the person who did 5 levels took less time per level than the person who did 3.

Montano1993 [528]2 years ago

4 0

Answer:

Step-by-step explanation: the unit rate for 3 in 15 mins is 1 every 5 minutes.

the unit rate for the second one would be 1 for every 4 however

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3(x + 1) - 2x = -6 what is X i need halp

Mashutka [201]

Answer:x=−9

Step-by-step explanation:

Apply the distributive property.

3 x + 3 ⋅ 1 − 2 x = − 6

Multiply 3 by 1

3 x + 3 − 2 x = − 6

Subtract 2x from 3x.

x + 3 = − 6

Move all terms not containing x to the right side of the equation.

Subtract 3 from both sides of the equation.

x = − 6 − 3

Subtract 3 from − 6 .

x = − 9

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3 years ago

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Select the number property that will justify the step in the following expression. 6 + (14 + 70) = (6 + 14) + 70 = 20 + 70 = 90

prohojiy [21]

Commutative property L

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3 years ago

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Use the quadratic formula to solve the equation.<br><br> 4x^2−10x+5=0

finlep [7]

Quadratic formula:

$x=\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

What do we have:

a=4

b=-10

c=5

Substitude:

$x=\frac{10±\sqrt{b^{2}-4(4)(5)}}{2(a)}$

Solve:

$x=\frac{10±\sqrt{(-10)^{2}-4(4)(5)}}{2(4)}\\\\x=\frac{10±\sqrt{100-4(20)}}{8}\\\\x=\frac{10±\sqrt{100-4(20)}}{8}\\\\x=\frac{10±\sqrt{100-80}}{8}\\\\x=\frac{10±\sqrt{20}}{8}\\\\x=\frac{10±2\sqrt{5 }}{8}\\\\x=\frac{2(±5\sqrt{5) }}{2(4)}$

Cancel the common terms:

$x=\frac{5±\sqrt{5} }{4}$

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3 years ago

Circle Q has a circumference of approximately 50 centimeters. Circle Q with diameter d is shown. What is the approximate length

ad-work [718]

Answer:

C: 15.9cm

Step-by-step explanation:

d= circumference/π

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2 years ago

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The area of a square shaped park measures 16900 square feet. How many feet of fencing would be needed to enclose that park?

sergey [27]

Answer:

520 feet

Step-by-step explanation:

The area=16900

Area formula=b^2

b^2=16900

square root of 16900=130

130*4=520

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3 years ago