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Citrus2011 [14]
3 years ago
12

What is the sum of the first 60 positive integers?. (Points : 1). 60. . 61. . 1800. . 1830

Mathematics
1 answer:
stira [4]3 years ago
4 0
Hello,


if 0 is a positive integer
        sum=0+1+...+59=(0+59)*60/2=59*30=1770
else
       sum=1+2+3+...+60=(1+60)*60/2=61*30=1830
end if

Answer D: 1830
In US, 0 is not positive, in Europe yes!!!

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Asher is asked to find the factors of 10. His work is below.
Assoli18 [71]

Answer:

  • B and D

Step-by-step explanation:

<u>Answer choices:</u>

A) Asher made errors in multiplication.

  • No, the products are correct

B) Asher found multiples of 10, not factors of 10.

  • Yes

C) Asher should have multiplied 10 × 4 as well.

  • No, 4 is not one of the factors of 10

D) Asher should have gotten this as the answer: 1, 2, 5, and 10.

  • Yes, these are the true factors of 10

E) Asher should have gotten this as the answer: 10, 20, 30, 40, …

  • No, the correct one is one before
5 0
2 years ago
Given that the expression 2x^3 + mx^2 + nx + c leaves the same remainder when divided by x -2 or by x+1 I prove that m+n =-6
Alla [95]

Given:

The expression is:

2x^3+mx^2+nx+c

It leaves the same remainder when divided by x -2 or by x+1.

To prove:

m+n=-6

Solution:

Remainder theorem: If a polynomial P(x) is divided by (x-c), thent he remainder is P(c).

Let the given polynomial is:

P(x)=2x^3+mx^2+nx+c

It leaves the same remainder when divided by x -2 or by x+1. By using remainder theorem, we can say that

P(2)=P(-1)              ...(i)

Substituting x=-1 in the given polynomial.

P(-1)=2(-1)^3+m(-1)^2+n(-1)+c

P(-1)=-2+m-n+c

Substituting x=2 in the given polynomial.

P(2)=2(2)^3+m(2)^2+n(2)+c

P(2)=2(8)+m(4)+2n+c

P(2)=16+4m+2n+c

Now, substitute the values of P(2) and P(-1) in (i), we get

16+4m+2n+c=-2+m-n+c

16+4m+2n+c+2-m+n-c=0

18+3m+3n=0

3m+3n=-18

Divide both sides by 3.

\dfrac{3m+3n}{3}=\dfrac{-18}{3}

m+n=-6

Hence proved.

7 0
2 years ago
Solve the following system of equations using substitution <br> x = 4 <br> 2x + 4y = 36
DiKsa [7]
Just plug in 4 for the x

2*4 +4y =36
8+4y =36
4y =36-8
4y=28
y= 28/4
y=7
7 0
2 years ago
Read 2 more answers
I really need the answer
Airida [17]

Answer:

232

Step-by-step explanation:

all u gotta do here is plug in 40 here so:

0.145(40)x^2

0.145(1600)

f(x)= 232

6 0
2 years ago
The seventh grade wants to break last year’s record of 78 coats collected for the annual clothing drive. They have already colle
Dimas [21]

Answer:

c + 13c ≥ 78c

78c - 13c =

65c

8 0
2 years ago
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