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GaryK [48]
3 years ago
8

Of the 15-year-olds at a karate school, 8 have black belts and 14 have brown belts. Among the 16-year-olds, 7 have black belts a

nd 12 have brown belts. Which age group has a lower ratio of black belts to brown belts? 15-year-olds 16-year-olds neither; the ratios are equivalent Submit
Mathematics
1 answer:
Lelechka [254]3 years ago
6 0
15yr olds have the lower ratio
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Whats the relationship between area and square units
stira [4]
Okie, when you are talking about area, you will have units of course! :-)
So, square units are the units in which describe the area. Let's take a rectangle slab of paper that is 2 inches by 4 inches. Yes, the answer is 8, but what are the units. It is inches squared! Squared units are the units of area.
I hope this helps :-)
7 0
3 years ago
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2) As part of traffic accident investigations, the speed of a car involved can be approximately determined by checking actual sk
dezoksy [38]

a) The speed of car was 60 mph.

b) The speed of car was 45 mph.

Step-by-step explanation:

Given,

a = actual skid marks

p = test skid marks

Formula;

s=30*\sqrt{\frac{a}{p}}\\

a) a = 144 feet, p = 36 feet

Putting in formula;

s = 30*\sqrt{\frac{144}{36}}\\\\s=30*\sqrt{4}\\\\s=30*2\\\\s=60

The speed of car was 60 mph.

b) a = 153 feet, p = 68 feet

Putting in formula;

s=30*\sqrt{\frac{153}{68}}\\\\s=30*\sqrt{2.25}\\\\s=30*1.5\\\\s=45

The speed of car was 45 mph.

Keywords: substitution, speed

Learn more about substitution at:

  • brainly.com/question/10940255
  • brainly.com/question/10941043

#LearnwithBrainly

4 0
3 years ago
Evaluate sigma notation k=0 4 3k + 1
defon

The answer should be 126 or A.

4 0
3 years ago
Polygon ABCDEF is translated 12 units to the left to create polygon A′B′C′D′E′F′. If DE = 7 units, what is D′E′ ?
gizmo_the_mogwai [7]
A translation is a rigid transformation, which means angle measures and distances from two points do not change.
Polygon ABCDEF is congruent to polygon A'B'C'D'E'F'

DE = D'E' = 7
8 0
3 years ago
Read 2 more answers
Find all solutions in radians. Approximate your answers to the nearest hundredth. (Let k be any integer.)
Bumek [7]

Answer: 0.73 + πk, 0.28 + πk

<u>Explanation:</u>

      cos (2x - 1) = 0.9

cos⁻¹[cos (2x - 1)] = cos⁻¹ 0.9

               2x - 1 = +/- 0.45

               2x      = +/- 0.45 + 1

                  x      = \frac{+/- 0.45 + 1}{2}

                  x      = \frac{0.45 + 1}{2},   x  = \frac{-0.45 + 1}{2}

                  x      = 0.73, 0.28

For ALL Solutions:

x = 0.73 + πk         and        x = 0.28 + πk

6 0
3 years ago
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