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Sonja [21]
3 years ago
11

Find the value of the expression 2x^2y if x=-1 and y=3

Mathematics
1 answer:
lesya692 [45]3 years ago
5 0

Answer:

12

Step-by-step explanation:

This value would be 2(-1)^2*2(3).  I have enclosed the given values of x and y for clarity.

This works out to 2(1)*2(3) = 12.

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Susie bought 14 dolls this week. Last week she had 28 dolls. Which of the
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Answer:

B. 28 + 14 = x

Step-by-step explanation:

Susie bought 14 dolls this week. Last week she had 28 dolls. determine how many dolls Susie has now.

using this info we know that we must find the sum of both numbers.

Hence, Answer B has the correct equation

3 0
3 years ago
Angle A and angle B are supplementary. The measure of angle B is 82.5.
stealth61 [152]

Answer:

Angle A = 97.5º

Step-by-step explanation:

Supplmentary means 2 angles that equal 180º. So we already have 1 angle, so now all we have to do is subtract 82.5 from 180.

180 - 82.5 = 97.5

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3 years ago
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I tried the two bottom ones and it’s wrong
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Answer:

Step-by-step explanation:

The answer is The cook need 1/12

Why??

3/4 -2/3 = 1 /12

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2 years ago
HELP!!! HELP!!! WILL GIVE BRAINLIEST
Nesterboy [21]

Answer:

(a) Two x plus eight is greater than negative four

(b) x > -6; number line would be an open circle at -6 and the line pointing in the positive direction to be shaded

Step-by-step explanation:

(a)

Note first that the inequality sign ">" means "greater than", so 2x + 8 > -4 in written language is:

<em>Two x plus eight </em><em>is greater than</em><em> negative four</em>

<em />

(b)

We solve this just like how we'd solve it if it were 2x + 8 = -4: isolate the variable first.

Subtract 8 from both sides:

2x + 8 - 8 > -4 - 8

2x > -12

Divide by 2:

x > -12/2

x > -6

So, the solution set is all numbers greater than -6.

Drawn on a number line, we would first place an <em>open circle</em> at -6 (because we are using > rather than ≥, which would include the -6 in the solution set). Then, because our solution set includes all numbers greater than -6, we shade in the part of the line that points in the positive direction, so it should include numbers like -5, -4, -3, -2, -1, 0, 1, 2, ... and so on.

3 0
3 years ago
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A tumor is injected with 0.92 grams of Iodine-125. After 1 day, the amount of Iodine-125 has decreased by 1.15%. Write an expone
skelet666 [1.2K]

Answer: After 1 day, the amount of Iodine-125 has decreased by 1.15%. Write an exponential decay model with A(t) representing the amount of Iodine-125 remaining

Step-by-step explanation:

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