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3 years ago

Write the following proportion using colons. 7 is to 21 as 3 is to 9.

1 answer:

eduard3 years ago

8 0

This is how proportion is written 7:21=3:9. The colons are sign of division so it can be shown in the terms of fraction as 7/21=3/9 or 1/3=1/3

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The difference between two numbers is 2 and their product is 224. What are the numbers?

Sati [7]

Let $x,y$ be the two numbers. We have two pieces of information:

$x-y=2$ (the difference between the two numbers is 2)

$xy=224$ (their product is 224)

From the first equation, we can deduce $x=y+2$

If we plug this expression in the second equation, we have

$xy = (y+2)y = 224 \iff y^2+2y-224 =0$

If you solve this equation with the usual quadratic formula you get the solutions

$y=-16,\quad y=14$

So, you have the following couple of solutions, recalling that x is 2 more than y:

$\begin{cases} x = -14\\y=-16\end{cases},\quad\begin{cases} x = 16\\y=14\end{cases}$

4 0

3 years ago

Classify each number below as an integer or not.

fomenos

Answer:

1. yes

2. no

3. yes

4. no

5. yes

Step-by-step explanation:

The method i use is if the number is not a fraction than it is an integer. besides 6 for some reason.

Here is the catch if the fraction can be simplified into a whole number than it is an integer.

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3 years ago

You want to spin blue. Does it matter which spinner you spin? Explain

Ulleksa [173]

Answer:

No, they both have a 2/6 (1/3) chance of spinning blue.

6 0

2 years ago

Melissa walked at a rate of 88 feet per minute. what was her approximate speed to the nearest tenth of a mile per hour? 0.1 mile

Setler [38]

88x60=5280
I believe it's 1 mile.

6 0

3 years ago

Read 2 more answers

1/8 in the form of 2^N

KIM [24]

Answer:

1.0905

Step-by-step explanation:

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3 years ago