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2 years ago

Kia rides her bicycle at 20 miles per hour. Which equation represents the situation?

Mathematics

1 answer:

sergejj [24]2 years ago

7 0

Answer:

(A)d=20h

Step-by-step explanation:

If Kia rides her bike at 20 miles per hour.

20 miles per hour is referred to as the Kia's Speed.

Now we know that:

$$Speed=\frac{Distance \:Travelled}{Time \:taken}$

Given:

Number of hours traveled=h
Distance traveled=d
Speed = 20 mph

Substituting these three into the formula above, we have:

$20=\dfrac{d}{h}\\$

Cross multiply

d=20h

The correct option is A.

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(2b) A rectangular prism measures 2 & 2/5 inches by 3 & 1/5 inches by 2 inches. How many cubes with edge length 1/5 inch

erastova [34]

Answer:

1920 cubes.

Step-by-step explanation

Turn both the mix numbers into improper fractions.

2 2/5 = 12/5

3 1/5 = 16/5

Then you will turn 1/5 into its reciprocal and multiply both the improper fractions by it. You can just casually multiply 2 and 5.

12/5 * 5/1 = 12

16/5 * 5/1 = 16

2 * 5 = 10

Next you multiply all together to get 1920 cubes.

(I could be missing a step. I apologize if I did.)

3 0

2 years ago

1. A heterozygous white-fruited squash plant is crossed with a yellow-fruited plant, yielding 200 seeds. of these seeds, 110 pro

garri49 [273]

Answer:

Part 1 , not significant

Part II, significant

Step-by-step explanation:

Given that a heterozygous white-fruited squash plant is crossed with a yellow-fruited plant, yielding 200 seeds. of these seeds, 110 produce white-fruited plants while only 90 produce yellow-fruited plants

$H_0: Both colours are equally likely\\H_a: Both colours are not equally likely$

(Two tailed chi square test)

We assume H0 to be true and find out expected

If H0 is true expected would be 100 white and 100 yellow

Chi square = $\Sigma \frac{(O-E)^2}{E} \\=\frac{(110-100)^2}{100} +frac{(90-100)^2}{100} \\=2$

df = 1

p value = 0.152799

Since p value > 0.05 at 5% level we accept that the colours are equally likely

Here observed are 1100 and 900

Expected 1000 & 1000

df = 1

Chi square = $\frac{20000}{100} =200$

p value <0.0001

These results are here statistically significant.

8 0

2 years ago

There is a 60% probability that a home in the United States has a large-screen TV. In a sample of six homes, what is the probabi

lesya [120]

Answer:

faster and smarter Homes its b

Step-by-step explanation:

I did this one

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2 years ago

Classify the triangles as acute obtuse or right

Law Incorporation [45]

Answer:

Acute

Obtuse

Right

Acute

Step-by-step explanation:

To see if a triangle is acute, right, or obtuse, you use something similar to the pythagorean theorem:

Let a and b be the shorter sides, c be the longest side.

If a^2+b^2 > c^2, then the triangle is acute.

If a^2+b^2 = c^2, then the triangle is right.

If a^2+b^2 < c^2, then the triangle is obtuse.

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2 years ago

How many teams haven't apperared in a super bowl A. 2 B. 5 C.4 D. None

liubo4ka [24]

Answer:

c. 4

Step-by-step explanation:

I'm correct if I'm rwong

5 0

2 years ago