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Ghella [55]
3 years ago
8

What is the value of 4x-1/2y-12 when x=5 and y=20

Mathematics
1 answer:
Iteru [2.4K]3 years ago
7 0

Answer:

the answer is -2

Step-by-step explanation:

Since x=5 and y=20, plug those values into the correct variables in the equation of 4x-1/2y-12.

When we do that it brings us to:

4(5)-1/2(20)-12

Then we just simplify:

20-10-12

Simplify again:

10-12

So 10-12 is -2, therefore -2 is the answer

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In one school, half of all students who like math like science as well. Also, in that school, a third of all students who like s
Nimfa-mama [501]

Answer:

2/3

Step-by-step explanation:

If we have 'x' students who like math and 'y' students that like science, we can formulate that:

Half of x likes math and science, and also one third of y likes math and science, so:

(1/2) * x = (1/3) * y

x / y = (1/3) / (1/2)

x / y = (1/3) * 2 = 2/3

So the ratio of the number of students who like math to the number of students who like science is 2/3

3 0
3 years ago
Read 2 more answers
Suppose that the probability of a drought in any independent year is 20%. Out of those years in which a drought occurs, the prob
astraxan [27]

Answer:

the correct option is d. 0.02

Step-by-step explanation:

We have the following events:

x: A drought occurd

y: Water rationing.

Therefore, according to the plaster we have:

P [x] = 0.20

P [y | x] = 0.10

Now P [it is a drought and water rationing happens] =

P [x n y] = P [y | x] * P [x] = 0.10 * 0.20 = 0.02

Which means that the correct option is d. 0.02

3 0
3 years ago
What is the additive inverse of 3?<br> a. -3<br> b. a+(-a)=0<br> c. 0<br> d. -a
finlep [7]

Answer:

<em>A. -3</em>

Step-by-step explanation:

<em>3 and -3 are additive inverses since 3 + (-3) = 0. -3 is the additive inverse of 3.</em>

8 0
3 years ago
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Carissa also has a sink that is shaped like a half-sphere. The sink has a volume of 3617 in3. One day, her sink clogged. She has
Oxana [17]

Answer:

864

Step-by-step explanation:

Volume of cup = ⅓pi×r²×h

Diameter = 2, radius = 1

= ⅓×3.142 × 1² × 4 = 4.1893333333 in³

To empty the sink, 864 scoops will be required

(3617/4.1893333 = 863.383)

3 0
3 years ago
PLEASE HELP ME IF YOU CAN! please tell me how you got the answer thank you!
Law Incorporation [45]

Answer:

D) 35.6

Step-by-step explanation:

Use pythagorean theorem

22^2 + 28^2 = 1268

Take square root of 1268, which equals to 35.60898763.

8 0
3 years ago
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