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serg [7]
3 years ago
6

Describe the mental math steps you would use to find 7(42) (this is the distributive property by the way. :] )

Mathematics
2 answers:
Zarrin [17]3 years ago
5 0

Answer: 294

Break up 42 like so: 42 = 40 + 2

Then we can say,

7*(42) = 7*(40+2) = 7*40 + 7*2 = 280 + 14 = 294

The mental math part is knowing that 7*4 = 28, then you add on a zero to get 7*40 = 280. This is added to 7*2 = 14 to get the final answer above.

Katarina [22]3 years ago
3 0

Answer:

multiply 7 by 42

= 294

42 x 7 can be done as mental math, but that is challenging for some people.

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35,710 written in scientific notation
Dmitrij [34]
The answer is 3571x10
4 0
3 years ago
Please help me with this math problem
Scilla [17]

Answer:

see below

Step-by-step explanation:

5x - 6y = 21

Let x = 0 and solve for y to find the y intercept

-6y = 21

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The y intercept is (0,-7/2)

5x - 6y = 21

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5 0
4 years ago
Read 2 more answers
6=1/4z-1<br> z= solve the equation
Gre4nikov [31]

Answer:

z = 28

Step-by-step explanation:

Let's try this first:

6 = something - 1

Something = 7

Next:

We know that "something" is 1/4z

1/4z = 7

Divide both sides by 1/4 to isolate z

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Hope this helps :)

Have an awesome day!!

8 0
3 years ago
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WILL GIVE BRAINLIEST
wlad13 [49]

A) Tonya bought 3 games at X price, so 3X would be total amount.

B) Tony's cost was 0.50 less than X, so x-0.50, he bought 4 games, so he spent 4(x-0.50).

C) Set those to equal to solve for x:

3x = 4(x-0.50)

D) Solve:

3x = 4(x-0.50)

Distribute:

3x = 4x - 2

Subtract 4x from both sides:

-X = -2

Multiply both sides by -1:

X = 2

E) Since X is the amount Tonya paid per game, Tony paid X - 0.50, so Tony paid 2 - 0.50 = $1.50 per game.

Check:

Tonya:  3x = 3(2) = $6 total

Tony: 4(x-0.50) = 4(2.00 - 0.50) = 4(1.50) = $6 total

8 0
3 years ago
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Jonathan owns a food truck that sells tacos and burritos. He sells each taco for $3
crimeas [40]

Here ya go!! Hope this helps :D

6 0
3 years ago
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