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soldier1979 [14.2K]
3 years ago
15

The sum of two numbers is 39 . the smaller number is 13 less than the larger number. what are the numbers

Mathematics
1 answer:
nekit [7.7K]3 years ago
3 0
13 and 26

13+26=39 and 26-13=13
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A submarine was 20 feet below sea level. If it ascends (goes up) 30 feet,
pshichka [43]

Answer:

10 ft above sea level

Step-by-step explanation:

20 below goes up by 30 then it would be -20 -10 0 10

6 0
2 years ago
The first two terms in an arithmetic progression are -2 and 5. The last term in the progression is the only number in the progre
Rudik [331]

Given:

The first two terms in an arithmetic progression are -2 and 5.

The last term in the progression is the only number in the progression that is greater than 200.

To find:

The sum of all the terms in the progression.

Solution:

We have,

First term : a=-2

Common difference : d = 5 - (-2)

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a_n=a+(n-1)d

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a_n=-2+(n-1)(7)

According to the equation, a_n>200.

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Divide both sides by 7.

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Add 1 on both sides.

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So, least possible integer value is 30. It means, A.P. has 30 term.

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S_n=\dfrac{n}{2}[2a+(n-1)d]

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S_{30}=\dfrac{30}{2}[2(-2)+(30-1)7]

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S_{30}=2985

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6 0
3 years ago
*the problem is in the pic that is uploaded
Alex787 [66]
Hmm,
ok,
complete square ok
wait wat

he went from
(x-3)²=16 to
x-3=16
?????
he square rooted the left side only
he has to do it to both sides

he should have done
(x-3)²=16
x-3=+/-4
x=3+/-4
x=7 or -1
8 0
3 years ago
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Lubov Fominskaja [6]

Answer:

The answer is below

Step-by-step explanation:

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0 0 1 2 -2]

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And these would be the next two steps in the process of solving the system.

4 0
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What is the solution set of the inequality?
jolli1 [7]

Answer:

In the pic

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)

5 0
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