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Debora [2.8K]
3 years ago
11

Please help with numbers 5 and 7!

Mathematics
1 answer:
natta225 [31]3 years ago
5 0
The answer for number 5 is= 6+2 bc 6×2=12 and 6+2=8
and I'm sorry I have no idea for number 7
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ohaa [14]
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8 0
3 years ago
Use substitution to solve the sy<br> 2x+3y = 19<br> x = 2y-1<br> Solve for x and y
svp [43]

Answer: Y=3, X=5

Step-by-step explanation:

2(2y-1) + 3y=19

4y-2+ 3y=19

7y=21

Y=3

Plug in y in the second equals

X=2(3) -1

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X=5

Hope this helps!

8 0
3 years ago
the hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. Forty-five copies of the book weigh
Nuetrik [128]

Keywords:

<em>System of equations, variables, hardcover version, paperback version, books </em>

For this case we must construct a system of two equations with two variables. Let "h" be the number of hardcover version books, and let "p" be the number of paperback version books. If the hardcover version of a book weighs 7 ounces and the paperback version weighs 5 ounces, to reach a total of 249 ounces we have:

7h + 5p = 249 (1)

On the other hand, if there are Forty-five copies of the book then:

h + p = 45 (2)

If from (2) we clear the number of books paperback version we have:

p = 45-h

As each paperback version book weighs 5 ounces, to obtain the total weight of the paperback version books, represented by "x" in the table shown, we multiply5 * p = 5 (45-h)

So, x = 5 (45-h)

Answer:

x = 5 (45-h)

Option D

8 0
3 years ago
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Aloiza [94]

Answer:

because a positive is over zero and a negative is below zero so from that you can tell that the opposite of any positive will be a negative.

Step-by-step explanation:

7 0
3 years ago
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The weight of 10 identical samples of a substance is 0.01 pound. What is the weight of 1000 samples?
lys-0071 [83]
The weight would be 10 pounds
7 0
3 years ago
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