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3 years ago

Will be mark brainless A. 28 B. 0 C. 4 D. 1

Mathematics

1 answer:

Vitek1552 [10]3 years ago

3 0

the answer to your problem is A or 28

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Please answer this correctly without making mistakes

victus00 [196]

Answer:

Question 2

Step-by-step explanation:

2) The time when she woke up was - 3° C

During nature walk, temperature got 3° C warmer than when she woke up.

So, temperature during nature walk = - 3 + 3 = 0° C

3 0

3 years ago

Find the slope of the line that passes through (1, 2) and (10, 10).

Rudiy27

Answer:

8/9

Step-by-step explanation:

10-2/10-1=8/9

slope=8/9

8 0

3 years ago

Read 2 more answers

2. Determine the sum of the first 400 ODD numbers.

il63 [147K]

Odd numbers take the form $2n-1$ , where $n\ge1$ is an integer. When $n=400$ , the last odd number would be 799. So we're adding

$S=1+3+5+\cdots+795+797+799$

By reversing the order of terms, we have

$S=799+797+795+\cdots+5+3+1$

and we can pair up terms in both sums at the same position to write

$2S=(1+799)+(3+797)+(5+795)+\cdots(795+5)+(797+3)+(799+1)$

so that we are basically adding 400 copies of 800, and from there we can find the value of the sum right away:

$2S=400\cdot800\implies S=160,000$

###

We could also make use of the formulas,

$\displaystyle\sum_{i=1}^n1=n$

$\displaystyle\sum_{i=1}^ni=\dfrac{n(n+1)}2$

We have

$S=\displaystyle\sum_{i=1}^{400}(2i-1)=2\sum_{i=1}^{400}i-\sum_{i=1}^{400}1=400(400+1)-400=400^2=160,000$

3 0

3 years ago

The triangle below is an equilateral triangle. Find y. 10 y+3

Colt1911 [192]

Answer:

y = 7

Step-by-step explanation:

An equilateral triangle has all its sides to be equal..

so.

10 = x

10 = y + 3

y = 10 - 3

y = 7

6 0

3 years ago

What are the endpoint coordinates for the midsegment of △JKL that is parallel to line JL?

nirvana33 [79]

(2.5, 2.5) and (2, 0)
But you knew that already
sorry

3 0

3 years ago

Read 2 more answers