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EleoNora [17]
4 years ago
14

What is the sum of -2 and -7?

Mathematics
2 answers:
user100 [1]4 years ago
7 0
The sum of this is -9
FromTheMoon [43]4 years ago
4 0
-7 + -2 = -9
-9
Sum of means addition
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Can someone help? I’m really stuck!
Masja [62]

Answer:

24x² -19x-35= 0

24x² -(40-21)x -35= 0

24x²-40x+21x-35=0

8x(3x-5) +7(3x-5)=0

(3x-5) (8x+7)=0

(Ax-5)(2Bx+C) = (3x-5) (8x+7)

Comparing them,

A = 3

B = 4

C= 7

AB-3C = (3×4) - 3(7) = 12-21 = -9

3 0
3 years ago
An economist believes that interest rates for thirty-year fixed-rate mortgage loans are decreasing. To investigate this further,
Contact [7]

Answer:

The null hypothesis is H_0: p = 0.22

The alternate hypothesis is H_1: p < 0.22

Step-by-step explanation:

To investigate this further, the economist would like to test the claim that the percent of thirty-year fixed-rate mortgage loans that have a 4.75 percent interest rate is less than 22%.

At the null hypothesis, we test that the proportion is of 22%, that is:

H_0: p = 0.22

At the alternate hypothesis, we test that the proportion is less than 22%, that is:

H_1: p < 0.22

7 0
3 years ago
Mary has a rectangular driveway. She measures it and finds out it is 14 1/4 feet long by 17 1/2 feet wide. She wants to know how
lawyer [7]
If I’m not mistaken it’s 99.75 dollars to cover her whole driveway
7 0
3 years ago
A radio disc jockey has 8 songs on this upcoming hour's playlist: 3 are rock songs, 3 are reggae songs, and 2 are country songs.
Artemon [7]

Answer:

\frac{3}{28} probability.

Step-by-step explanation:

Probability:

\frac{2}{8} of choosing country first try.

\frac{3}{7} of choosing reggae without replacement.

\frac{2}{8} *\frac{3}{7} =\frac{6}{56} =\frac{3}{28}

4 0
4 years ago
Dolly used 10 pints of ice cream at her birthday party. Each person was served 2/5 pint of ice cream. How many people were serve
KonstantinChe [14]
25 people were served
5 0
3 years ago
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