Write an algebraic expression for 15 decreased by twice a number

Answers

Answer 1

Answer: 15-2x= that would be the algebraic equation. Remember that decrease usually means minus. A number is always represented by a variable, and then anything that by is usually a multiplication or division depending on how its stated.

Answer 2

Answer: An algebraic expression is, obviously, an expression with a variable.

"A number" would represent a variable, which, in this case, we'll use y.

So, 15 decreased by twice x.
15 - y x 2 =

I hope this helped :)

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How do you solve equations with rational coefficients?

Answers

You've been doing that all this time and didn't even realize it !

Every plain old number that you ever see is a rational number.
Every equation that has plain old numbers next to the variables
is an equation with rational coefficients.

If a variable ever has (pi) or a square root or a trig function next to it,
then that's an irrational coefficient. But I'll just bet you haven't ever
seen any of these yet.

Add or subtract mentally 8.01+1.09

Answers

The answer is 9.10 (since you put an addition sign.)

Add mentally =9.10
subtract mentally=6.92

Plot 1 1/3 and 2 7/9

Answers

Answer:

I plotted them for you!

The first dot (closest to the left) is 1 1/3 and the one closest to the right is 2 7/9 :)

Step-by-step explanation:

Hope this helped :) good luck!

Can you please work this out and explain it?
☆ please work out on paper if you can☆

Answers

-- From the 1st to the 2nd column:
Fat increased by 5 grams
Calories increased by 70 = 14 more calories per each additional gram of fat.

-- From the 2nd to the 3rd column:
Fat increased by 2 grams
Calories increased by 28 = 14 more calories per each additional gram of fat.

-- From the 3rd to the 4th column:
Fat increased by 8 grams
Calories increased by 112 = 14 more calories per each additional gram of fat.

-- From the 4th to the 5th column:
Fat increased by 3 grams
Calories increased by 42 = 14 more calories per each additional gram of fat.

Each time the grams of fat increase, the calories increase by 14 calories
per additional gram. So the data represent a linear relationship, and the
rate of change is 14 calories per gram of fat.

What are hidden questions and why are they important

Answers

they are questions that are not specifically stated in the problem exg

you have a triagle
2 side angles add up to 30, find the 3rd angle

you have to remember that the 3 angles add up to 180

hidden quetsions are somethings that gives you a little more information about that word problem that you probaly didnt notice before and they are important because if they are missed in the problem the whole thing can be wrong

In exercises 3-6, write the expression in terms of sine or cosineSin 22°

Cos 56°

Cos 15°

Sin 37°

Answers

sin 22 = 0.3746
cos 56=0.5592
cos 15= 0.9659
sin 37=0.6018
just punch it in you calculator (ex. sin(22) and it should be in degree mode if you're using graphing calculator)

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