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3 years ago

Use the distributive property to evaluate each expression 4(8-7), 4(x-6y), 6(5-q), (d+2)(-7)

Mathematics

2 answers:

Whitepunk [10]3 years ago

7 0

Answer:

Rewrite the expression 10(15 – 6) using the distributive property of subtraction.

A) 10(6) – 10(15)

B) 10(9)

C) 10(6 –15)

D) 10(15) – 10(6)

Show/Hide Answer

A) 10(6) – 10(15)

Incorrect. Here a greater number would be subtracted from a lesser number, and the answer would not be a whole number. The correct answer is 10(15) – 10(6).

B) 10(9)

Incorrect. The numbers in parentheses were subtracted before the number 10 could be distributed. The correct answer is 10(15) – 10(6).

C) 10(6 –15)

Incorrect. You probably used the commutative law instead of the distributive property. The correct answer is 10(15) – 10(6).

D) 10(15) – 10(6)

Correct. The 10 is correctly distributed so that it is used to multiply the 15 and the 6 separately.

Step-by-step explanation:

NeTakaya3 years ago

6 0

Answer:

32-28, 4x-24y, 30-54, d+2, -7

are the commas supposed to be a +,-, or * sign?

Step-by-step explanation:

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The ratio of violinists to cellists in the school orchestra must always be 7:3. If the school orchestra has 21 violinists, what

Papessa [141]

Given:

Violinists : Cellists = 7:3.

Number of violinists in the school orchestra = 21

To find:

The combined number of cellists and violinists.

Solution:

Let the number of violinists and cellists in the school orchestra are 7x and 3x respectively.

Then, combined number of cellists and violinists is

$\text{Combined number of cellists and violinists}=7x+3x$

$\text{Combined number of cellists and violinists}=10x$ ...(i)

Number of violinists in the school orchestra = 21

$7x=21$

Divide both sides by 7.

$x=3$

Now, the combined number of cellists and violinists is

$\text{Combined number of cellists and violinists}=10(3)$ [Using (i)]

$\text{Combined number of cellists and violinists}=30$

Therefore, the combined number of cellists and violinists is 30.

5 0

3 years ago

Need help plz very much

andrew-mc [135]

Answer:

Step-by-step explanation:

Remember that when we are dividing two exponents with the same base (here, it's 13), we can subtract the values of the powers:

$\frac{a^m}{a^n} =a^{m-n}$

So, here, we have $\frac{13^{10}}{13^7}$ , so we subtract 7 from 10:

$\frac{13^{10}}{13^7}=13^{10-7}=13^3$

Thus, 3 should go in the box.

6 0

3 years ago

For each value of y, determine whether it is a solution to 7y - 9 = -58

V125BC [204]

Answer:

The answer is -7.

Step-by-Step explanation:

8 0

3 years ago

(-r-5)-(-2r-4) help me solve pls lol

vaieri [72.5K]

<h3>answer:</h3>

$r - 1$

<h3>Step by step explanation:</h3>

<h3> Step 1: Distribute</h3>

$( - r - 5) - ( - 2r - 4) \\ ( - r - 5) + 2r + 4$

<h3>Step 2: Eliminate redundant parenthesis</h3>

$( - r - 5) + 2r + 4 \\ - r - 5 + 2r + 4$

<h3>Step 3: Add numbers</h3>

$- 3 \purple{ - 5} + 2r + \purple{4} \\ - r \purple{ - 1} + 2r$

<h3>Step 4:Combine like terms </h3>

$\purple{ - r } - 1 + \purple{2r} \\ \purple{1r} - 1$

<h3>Step 5:Multiply by 1</h3>

$1r - 1 \\ r - 1$

Hopefully it's help

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2 years ago

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A sixth-grade student bought three cans of tennis balls for $4 each. Sales tax for all three cans was $.95. Write an expression

makkiz [27]

There are a few ways to write the expression but here is one (3*4.00) + .95

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3 years ago

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