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3 years ago

10

If you add the digits in a two-digit number and multiply the sum by 7, you get the original number. If you reverse the digits in

the two-digit number, the new number is 18 more than the sum of its two digits. What is the original number?

1 answer:

erik [133]3 years ago

8 0

I got 42.......................

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STATE ALL OF THE MODULES THAT ARE INCLUDED IN DISCRETE MATHEMATICS.

serious [3.7K]

Module 1: set, relations, functions, numbers

Module 2: logic and boolean algebra

Module 3: combinatorics and probability

Module 4: graphs and trees

Module 5: induction and recursion

Module 6: grammars, languages and finite state machines.

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3 years ago

the distance between nick and sara's house is 546m. Nick can walk 1.3m/sec. using the formula d=rt, where d is distance, r is ra

Paraphin [41]

Rearrange the formula to solve for time. Which is the distance over the rate. Then divide 546 meters by 1.3 meters per second. The meter units cancel each other out leaving you with : t: 420.

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3 years ago

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A triangle and a parallelogram both have areas of 20 cm2 and bases of 5 cm. How do their heights compare?

9966 [12]

The answer is d.

The parallelogram is 2 times the height of the triangle.

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4 years ago

a film canister in the shape of a cylinder has a height of 8 centimeters and a volume of the film canister. write an equation fo

sdas [7]

Answer:

Part a) The equation for the volume of the film canister is

$32\pi=\pi r^{2}(8)$

Part b) The radius of the film canister is $2\ cm$

Step-by-step explanation:

<u><em>The complete question is</em></u>

A film canister in the shape of a cylinder has a height of 8 centimeters and a volume of 32π cubic centimeters.

a. Write an equation for the volume of the film canister.

b. What is the radius of the film canister?

Part a) Write an equation for the volume of the film canister

we know that

The volume of a cylinder is equal to

$V=\pi r^{2} h$

where

r is the radius of the circular base

h is the height of the cylinder

we have

$V=32\pi\ cm^3$

$h=8\ cm$

substitute

$32\pi=\pi r^{2}(8)$ ----> equation for the volume of the film canister

Part b) What is the radius of the film canister?

we have

$32\pi=\pi r^{2}(8)$

$32\pi=8\pi r^{2}$

Simplify

Divide by 8π both sides

$4=r^{2}$

square root both sides

$r=2\ cm$

6 0

4 years ago

Rashawn read 25 pages of his book each day until he finished the book. His book was 400 pages long.

katrin [286]

Given that <span>Rashawn read 25 pages of his book each day until he finished the book. His book was 400 pages long.

The number of days it takes him to finish the book is given by 400 / 25 = 16 days.

In 0 days, he has 400 pages remaining and in 16 days he has 0 pages remaining.

Therefore, the graph that represents the situation is a</span><span> graph in the first quadrant containing a line segment. The x axis is labeled Days and the y axis is labeled Pages remaining. The endpoints of the line segment are (0, 400) and (16, 0).</span>

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4 years ago