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Dimas [21]
3 years ago
13

Negative nine times a number equals -117

Mathematics
2 answers:
Rus_ich [418]3 years ago
7 0
-9(x) = -117

Solve for "a number" (x). Isolate it. Note the equal sign. What you do to one side, you do to the other. Divide -9 from both sides.

-9x/-9 = -117/-9

x = -117/-9

x = 13

13 is your answer

hope this helps
irakobra [83]3 years ago
6 0
Let's have X represent the number we're looking for.
Times means that we are multiplying, so let's make an equation.
-9x=-117
We know by looking at this equation that the number is positive since the number is multiplied by a negative and the answer is negative.
Let's get x by itself by dividing both sides by -9.
-117÷-9=13=x

So, the number is 13.
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3 years ago
1/2s=4s-21 I don't understand
Dimas [21]
\frac{1}{2} s = 4s - 21

First, simplify \frac{1}{2} s to \frac{s}{2} / Your problem should look like: \frac{s}{2} = 4s - 21
Second, multiply both sides by 2. / Your problem should look like: s = 8s - 42
Third, subtract 8s from both sides. / Your problem should look like: s - 8s = -42
Fourth, simplify s - 8s to -7s. / Your problem should look like: -7s = -42
Fifth, divide both sides by -7. / Your problem should look like: s =  \frac{-42}{-7}
Sixth, simplify \frac{42}{-7} to - \frac{42}{7} / Your problem should look like: s =  \frac{42}{7}
Seventh, simplify \frac{42}{7} to 6. / Your problem should look like: s = 6

Answer: s = 6

4 0
3 years ago
HELP ME PLEASE! 30 POINTS
bazaltina [42]

Answer:

C=14

Step-by-step explanation:

To find the minimum value, graph each of the inequalities. After graphing each inequality, test a point and shade the region that satisfies the inequality. Once all inequalities have been shaded, find the region where they all overlap. The region will be bounded by intersection points. Test each of these points into C=x+3y. The least value for C is the minimum.

(14,0)                  (0,17.5)                   (3.08,3.64)

C=14+3(0)           C=0+3(17.5)           C=3.08 + 3(3.64)

C=14                   C=52.5                   C=14

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