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notsponge [240]
3 years ago
8

Sarah drove 40 miles per hour. In 3 hours, Sarah drove 120 miles. Which is a valid proportion to represent the problem?

Mathematics
2 answers:
olga55 [171]3 years ago
6 0
D=rt       120=40mph*3hours
prohojiy [21]3 years ago
5 0

Answer:

This proportion is valid to represent the problem \frac{miles}{hours} = \frac{40}{1}=\frac{120}{3}

Step-by-step explanation:

A proportion is simply a statement that two ratios are equal.

With the data provided for the problem you can say that \frac{40}{1}=\frac{120}{3} this proportion is read as "forty miles is to 1 hour as one hundred twenty miles is to three hours."

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If a student answer 67 exam questions correctly out of 100,what fraction and what personage of question did the students answers
VikaD [51]

Answer:

A and D

Step-by-step explanation:

67 right out of 100 for the fraction and 67/100 = 67%

5 0
3 years ago
Read 2 more answers
Two circles with different radii have chords AB and CD, such that AB is congruent to CD. Are the arcs intersected by these chord
emmainna [20.7K]

The arcs intersected by these chords are not congruent.

Given that two circles with different radii have chords AB and CD, such that AB is congruent to CD.

Let r₁ and r₂ be the radii of two different circles with centers O and O' respectively.

Assuming that the each of the ∠АОВ  and ∠CO'D is less than or equal to π.

Then, we have isosceles triangle AOB and CO'D such that,

AO = OB = r₁,

CO' = O'D = r₂,

Let us assume that r₁< r₂;

We can see that arc(AB) intersected by AB is greater than arc(CD), intersected by the chord CD;

arc(AB) > arc(CD)      .......(1)

Indeed,

arc(AB) = r₁ angle (AOB)

arc(CD) = r₂ angle (CO'D)

So, we have to prove that ;

∠AOB >∠CO'D       ......(2)

Since each angle is less than or equal to π, and so

∠AOB/2  and ∠CO'D/2 is less than or equal to π

it suffices to show that :

tan(AOB/2) >tan(CO'D/2) ......(3)

From triangle AOB :

tan(AOB/2) = AB/(2*r₁)

tan(CO'D/2) = CD/(2*r₂)

Since AB = CD and r₁ < r₂ (As obtained from the result of (3) ), therefore, arc(AB) > arc(CD).

Hence, for two circles with different radii have chords AB and CD, such that AB is congruent to CD but the arcs intersected by these chords are not congruent.

Learn more about congruent from here brainly.com/question/1675117

#SPJ1

6 0
2 years ago
1. What types of numbers make up the set of rational numbers?
Ad libitum [116K]

Answer:

Natural Numbers, Whole Numbers, and Integers are rational numbers.

Example: {1, 2, 3, -1, -2, -3}

Numbers with repeating decimals and terminating decimals are also rational.

Example: {2.34343434..., 3.45}

If a square root makes a perfect square, then it is rational.

Example: {√16, √100}

Hope this helps.

8 0
3 years ago
Which of the following is equivalent to the sum of
barxatty [35]
Answer:I think it’s A sorry if it’s wrong.
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2 years ago
What is the 75% of 1119
Dominik [7]

Answer:

839.25

Step-by-step explanation:

75 x 1119 / 100 = 839.25

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