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Rus_ich [418]
3 years ago
11

What is the value of the expression 3x2 – 2y, if x - -2 and y = -4. 0 20 52 O-8 02​

Mathematics
1 answer:
Dafna11 [192]3 years ago
6 0

Answer:

I think the answer is 20....I'm so sorry if that is wrong :[

You might be interested in
How do i solve -2y=8
Viefleur [7K]
If you're trying to solve for y
-2y = 8
Divide -2 to both sides
\frac{-2y}{-2} =  \frac{8}{-2}
Cancel out the -2 on the left, Divide the -2 to the 8 on the right so
y = -4
4 0
4 years ago
Read 2 more answers
After comparing response times between the audio and picture portions of the MIT test, the t-test resulted in a t-value of 2.97.
Veronika [31]

Answer:

e. reject the null hypothesis the p value is less than 0.05. therefore the difference is significant.

Step-by-step explanation:

given that after comparing response times between the audio and picture portions of the MIT test, the t-test resulted in a t-value of 2.97.

test statistic t = 2.97

Sample size n =250

Critical value of t at 95% is 1.96

We find that test statistic absolute value is greater than 1.96

So p value would be less than 0.05

This implies that null hypothesis stands in the rejected region.

So reject null hypothesis would be correct conclusion.  Sample size cannot be said to be small as more than 30 itself is a good sample size.

e. reject the null hypothesis the p value is less than 0.05. therefore the difference is significant.

5 0
3 years ago
URGENT URGENT URGENT!!!<br> HELP PLEASE!!
viva [34]

Answer:

Step-by-step explanation:

I think it’s b correct me if I’m wrong

3 0
3 years ago
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The fastest clapper in the world can clap 720 times in 60 seconds. What is the unit rate? *
Anton [14]

Answer: 12 claps per second

Step-by-step explanation: divide both by 60 and yield 12 times -1 second

6 0
3 years ago
Find two consecutive even integers such that the square of the second, decreased by twice the first is 52
Fiesta28 [93]

Let the first integer be x. So, the next even number is x+2

Let's translate the formula: the square of the second is (x+2)^2, twice the first is 2x. So, the equation is

(x+2)^2 - 2x = 52

Expand the square to get

x^2+4x+4-2x = 52 \iff x^2+2x+4 = 52 \iff x^2+2x - 48 = 0

The solutions to this equations are

x = -8,\quad x = 6

So, the possible consecutive even numbers are

-8\text{ and } -6\quad\text{or}\quad 6\text{ and } 8

8 0
3 years ago
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