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bekas [8.4K]
3 years ago
10

R - 7 = 1 can someone help me with this

Mathematics
2 answers:
daser333 [38]3 years ago
7 0

Answer:

r=8

Step-by-step explanation:

r-7=1 add seven to both sides

r=1+7\\r=8

Hope this helps

kobusy [5.1K]3 years ago
4 0

Answer:

The correct answer to this problem is r = 8.

Step-by-step explanation:

To solve this problem, we have to remember that our goal is to get the variable (in this case, r) by itself on one side of the equation.  To do this, we have to get rid of the -7 on the left side of the equation.  Therefore, our first step is to add 7 to both sides of the equation.  This gives us:

r - 7 = 1

r - 7 + 7 = 1 + 7

r = 8

Thus, your answer is r = 8.

Hope this helps!

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20x^2=256+128x. Solve by Factoring.
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Hey there,
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3 years ago
PLEASE HELP
Viefleur [7K]
7x²=9+x
so
for
0=ax²+bx+c

x=\frac{-b+/-\sqrt{b^2-4ac}}{2a}
so

7x²=9+x
mins 9 from both sides and minus x
7x²-1x-9=0
a=7
b=-1
c=-9


x=\frac{-(-1)+/-\sqrt{(-1)^2-4(7)(-9)}}{2(7)}
x=\frac{1+/-\sqrt{(-1)^2+4(7)(9)}}{2(7)}
so the 4th one
4 0
3 years ago
Tobias made a fruit salad with a blueberry to raspberry ratio of 8:6. Tobias' container of blueberries contains 72 blueberries.
ipn [44]

Answer:

54.

Step-by-step explanation:

8/6 = 72/ x where x is the number of raspberries.

8x = 6*72

8x = 432

x = 54.

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