An office supply store sells report covers at 3 for $0.96. If the rate remains the same, how much will 10 covers cost? Please show your work. Explain.

Answers

Answer 1

Answer: We can use a proportion to figure this out.If we get 3 for 0.96 (3/0.96) how many can we get for 10 (10/x)?So far it should look like this 3/0.96= 10/xNow we cross multiply. 0.96 times 10 is 9.6 and 3 times x is 3x. To get rid of the 3 we divide by it to get x alone. So 9.6 divided by 3 equals 3.2. I hope that this helps you. Try writing out the proportion of you don't understand! :)

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What is 1/3 times 9x

Answers

The expression is 3x.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

We can write an expression as,

(1/3) x (9x)

= (9/3)x

= 3x

Thus,

The expression is 3x.

Learn more about expressions here:

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if you change the 9 to 9/1 then multiply 1/3 and 9/1 you would get 3

A recipe that makes 16 cookie calls for 1/4 cup sugar and 2/3 cup flour. Janelle wants to proportionally increase these amounts to get a new recipe using one cup of sugar. Using the new recipe, how much flour should she use? How many cookies can she make with the new recipe

Answers

just multiply by 4
4x2/3= 2 2/3
4x16= 64

it is projected that the population of the United states in 2050 will be 419,854,000. write that number in expanded notation using exponents.

Answers

400,000,000 + 10,000,000 + 9,000,000 + 800,000 + 50,000 + 4,000

Write the ratio as a fraction in simplest form. Then EXPLAIN its meaning: Mrs. Simpson's class has 10 girls and 15 boys. What is the ratio of girls to boys?

Answers

so the ratio is girl/boy which is equal to 10/15 and the simplest form is 2/3 :)))
i hope this is helpful
have a nice day

Simplify (18 + t) (-3) + 9

Answers

The answer is (18 + t) * (-3) + 9 is t= -15.

actually it is -3t-45

Find the value of: $27x^(3)+8 y^(3)$ if 3x+2y = 20 and xy = $(14)/(9)$

Answers

$27x^3+8y^3=(3x)^3+(2y)^3=(3x+2y)[(3x)^2-3x\cdot2y+(2y)^2]\n\n=(3x+2y)[(3x)^2+2\cdot3x\cdot2y+(2y)^2-3\cdot3x\cdot2y]\n\n=(3x+2y)[(3x+2y)^2-18xy]=(*)\n---------------------------\n3x+2y=20\n\nxy=(14)/(9)\n------------------------------\n(*)=20\cdot(20^2-19\cdot(14)/(9))=20\cdot(400-18\cdot(14)/(9))=20\cdot(400-2\cdot14)\n\n=20\cdot(400-28)=20\cdot372=7440$

$a^3+b^3=(a+b)(a^2-ab+b^2)\n\n(a+b)^2=a^2+2ab+b^2$

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