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Hoochie [10]
3 years ago
12

15-(-5)= ....... And 20-(-12)=.....

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
7 0

Answer:

1st Problem: 20   2nd Problem: 32

Step-by-step explanation:

When you have two negatives right next to each other, they turn into positives. So, you <u><em>add</em></u> instead of subtract.

15 + 5 = 20

20 + 12 = 32

Ann [662]3 years ago
3 0

Answer:15-(-5)=20

20-(-12)=32

Step-by-step explanation:

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HELP. How long is the minor axis for the ellipse shown below?
kifflom [539]

Given:

The equation of ellipse is

\dfrac{(x+4)^2}{25}+\dfrac{(y-1)^2}{16}=1

To find:

The length of the minor axis.

Solution:

The standard form of an ellipse is

\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1      ...(i)

where, (h,k) is center, if a>b, then 2a is length of major axis and 2b is length of minor axis.

We have,

\dfrac{(x+4)^2}{25}+\dfrac{(y-1)^2}{16}=1      ...(ii)

On comparing (i) and (ii), we get

b^2=16

Taking square root on both sides.

b=\pm 4

Consider only positive value of b because length cannot be negative.

b=4

Now,

Length of minor axis = 2b

                                  = 2(4)

                                  = 8

So, the length of minor axis is 8 units.

Therefore, the correct option is B.

8 0
2 years ago
Somebody help on 39 and 40 !
BlackZzzverrR [31]
39 is A
40 is D
And that is my answer
3 0
2 years ago
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Complete the statements about the series
AleksAgata [21]

Answer:

Ok, first in our series we can see two numbers in the Sigma, one bellow 0, and other above, 4.

This means that the value of k will go from 0 to 4, then all the numbers in the sum are:

(-1/2)^0 + (-1/2)^1 + (-1/2)^2 + (-1/2)^3 + (-1/2)^4

So we have 5 terms in our series.

b) to see the sign in each term, we must solve the powers, remember that:

(-1)^n is -1 if n is odd, and is equal to 1 if n is even, so we have:

(-1/2)^0 + (-1/2)^1 + (-1/2)^2 + (-1/2)^3 + (-1/2)^4

= 1 -1/2 + 1/4 - 1/8 + 1/16.

So the sign in each term of the series alternates.

4 0
3 years ago
Solve the inequality m + 2 &lt; -4
jeka57 [31]

Answer:

m < - 6

Step-by-step explanation:

Given

m + 2 < - 4 ( subtract 2 from both sides )

m < - 6

7 0
2 years ago
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Lourdes plans to jog at least 1.5 miles. Write an inequality and solve an inequality to find x, the number of hours Lourdes will
Paraphin [41]

Answer:

1.5 ≤ 3.75x

Step-by-step explanation:

Given that:

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Hence,

D ≤ Actual distance

1.5 ≤ 3.75x

4 0
3 years ago
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