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mr_godi [17]
3 years ago
13

One number is 5 more than another number. their sum is −15 . what are the numbers?

Mathematics
1 answer:
Aliun [14]3 years ago
6 0
X=5+y
x+y=-15

subsitute 5+y for x

5+y+y=-15
5+2y=-15
minus 5 from both sides
2y=-20
divide both sides by 2
y=-10

sub back
x=5+y
x=5-10
x=-5

the numbers are -10 and -5
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Leokris [45]

Answer:

Yes

Step-by-step explanation:

25.12 inches of circumference is equal to the radius of 3.998 inches

4 inches > 3.998 inches

Therefore it fits


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3 years ago
What is the x-intercept of y=5x+20?
densk [106]

Answer:

the x intercept is -4

Step-by-step explanation:

to find the x intercept, set y = 0 and solve for x

y = 5x+20

0 = 5x+20

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-20 = 5x +20 -20

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7 0
3 years ago
Help me with math please, quickly
irga5000 [103]

Answer:

3\neq -3

False

Step-by-step explanation:

y=3x-9\\\\x-\frac{1}{3}y=-3

You substitute y for the second equation.

x-\frac{1}{3} y=-3\\\\x-\frac{1}{3}(3x-9)=-3

Then you have to distribute -\frac{1}{3} .

x-x+3=-3

Combine like terms.

3\neq -3

7 0
2 years ago
Read 2 more answers
What is the volume of the cone? Use π ≈ 3.14. 12.56 cubic units 18.84 cubic units 20.93 cubic units 25.12 cubic units
HACTEHA [7]

Answer:

volume of cone = 12.56 cubic units

Step-by-step explanation:

Volume of cone = 1/3  π r² h

            r = 2

            h = 3

then

V= 1/3 3.14 * (2) ² 3

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4 0
3 years ago
What is the arithmetic sequence in this problem . help plz
adell [148]

Answer:

<u>a(n)=80*(9/10)^(n-1)</u>

Step-by-step explanation:

I think u r confused

this sequence is geometric not arithmetic

HOw we know that ??

when we get a common difference  <u>that must Be equal  </u>

d=72-80=-8  not equal to  d=64.8-72=-7.2

So it is not arithmetic

but when we get the common ratio that also must <u>be equal </u>

r=72/80=9/10 equal to   r=64.8/72=9/10

So it is geometric

By using this equation:

a(n)=a*r^(n-1)

and we have <u>a=80 , r=9/10</u>

Then       <u>a(n)=80*(9/10)^(n-1)</u>

<em>I really hope this helps <3</em>

6 0
3 years ago
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