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kondor19780726 [428]
2 years ago
13

What is the sum of -9 and -18?

Mathematics
2 answers:
Volgvan2 years ago
6 0
-9+-18=-27 You simply add the two negative answers to find your final answer. -27
Tcecarenko [31]2 years ago
3 0

Answer: The answer to the question you asked up top would be -27, however the question in the picture doesn't match. As for the question in the picture, the answer is should be choice B or  4 square root 2i

Step-by-step explanation:

The first one: add the number together since they are both negative and just place a negative sign in front.

The second one: break down the square root of -18 into 9*-2. Then add   \sqrt{-2} +  3 \sqrt{-2}  which equals 4\sqrt{2}i

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The domain of F(x) is the set of all numbers greater then or equal to 0 and less or equal to 2.
lisov135 [29]
The answer should be B false
5 0
2 years ago
If x2+y2 = 12 and x2-y2=18, what is the value of x4-y4?
nataly862011 [7]

Answer:

Step-by-step explanation: add the equations

2x² = 30

x² = 15

y² = 12 - 15

    = -3

x4 -y4 = 15² - (-3)²

           = 216

6 0
1 year ago
10. If x = -2, y=-6 and z= 4, find the value of 4xy<br>Z​
Grace [21]

Answer:

192

Step-by-step explanation:

Given

4xyz ← substitute given values into expression

= 4 × - 2 × - 6 × 4 = - 8 × - 24 = 192

5 0
2 years ago
Why is 4 + (−3) equal to 1?
vladimir2022 [97]

Answer:

2nd option

Step-by-step explanation:

4 + (-3) = 1 because the signs mismatch, something cannot be both positive or negative. When the signs are the same, whether it be both positive or both negative, the answer will always be positive, while if the signs are mismatching the answer will always be negative.

Hope I helped!

7 0
2 years ago
Please help! will give brainliest. click for the picture
vesna_86 [32]

Answer:

Gimme some time

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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