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Svetach [21]
3 years ago
15

Help me with this equation!

Mathematics
2 answers:
vlada-n [284]3 years ago
8 0
The correct answer is B. -12
vova2212 [387]3 years ago
5 0

Answer:

-12

Step-by-step explanation:

a + 5 = -7

Collecting terms:

a = -7 + (-5)

a = -7-5

a= -12

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Which of the following is NOT a monomial?
Alexandra [31]

wutz da optionz????????

3 0
2 years ago
n=400 people under the age of 25 was asked whether they check social media sites right after they wake up. 42% check social medi
Aliun [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

p = 0.5

For the alternative hypothesis,

p < 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

P = 42/100 = 0.42

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

n = 400

z = (0.42 - 0.5)/√(0.5 × 0.5)/400 = - 3.2

Recall, population proportion, p = 0.5

We want the area to the left of 0.5 since the alternative hypothesis is lesser than 0.5. Therefore, from the normal distribution table, the probability of getting a proportion < 0.5 is 0.00069

So p value = 0.00069

Since alpha, 0.05 > than the p value, 0.00069, then we would reject the null hypothesis.

Therefore, there is significant evidence to conclude that that less than 50% of people under the age of 25 check social media sites right after they wake up.

7 0
3 years ago
Can someone help me p
Serga [27]

Answer:

(3.5, -2)

Step-by-step explanation:

that point is where the edge if the rectangle is

5 0
3 years ago
5/6 minus (- 3/4) <br> HELP PLS
n200080 [17]

Answer:

In order to solve this problem, you have to find the lowest common denominator.  Take multiples of both 6 and 4 and see which is the lowest you have in common.

4: 4, 8, 12, 16, 20

6: 6, 12, 18, 24

So 12 is the lowest common multiple....

5/6 x ?/? = ?/12 (you have to multiply the numerator and the denominator by the same number)

3/4 x ?/? = ?/12 (you have to multiply the numerator and the denominator by the same number)

When the denominators are the same, you can subtract the numerators.  The denominator will stay 12!

Step-by-step explanation:

YAY! I want a brain

8 0
3 years ago
Read 2 more answers
What’s the next step to solve the equation -2(n+3)= 9
elena-s [515]

Answer:

-15/2

Step-by-step explanation:

The next step would be to distribute the negative two through the parenthesis,

-2n-6=9

then you add the six, -2n= 15

then you divide by 15 by negative 2 and get -15/2

8 0
3 years ago
Read 2 more answers
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