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3 years ago

Find the length of the side of a square with an area of 49.

Mathematics

1 answer:

Artyom0805 [142]3 years ago

8 0

7 is the answer

Area =length *breadth

Area =length *length

Area=49=x *x

$49 = {x}^{2} \\ \sqrt{49} = x \\ x = 7$

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(Calculus help, 25 points, will give brainliest) Find the sum of the sigma notation below.

Andreyy89

$\displaystyle\sum_{i=3}^{10}(2i-9)=2\sum_{i=3}^{10}i-9\sum_{i=3}^{10}1$

Recall that

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

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

Your sums start at $i=3$ , so in order to apply these formulas directly, you need to compensate for the missing first two terms:

$\displaystyle\sum_{i=3}^{10}1=\sum_{i=1}^{10}1-(1+1)=10-2=8$

$\displaystyle\sum_{i=3}^{10}i=\sum_{i=1}^{10}i-(1+2)=\frac{10\cdot11}2-3=52$

$\implies\displaystyle\sum_{i=3}^{10}(2i-9)=2\cdot52-9\cdot8=\boxed{32}$

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3 years ago

Which fraction is closest to 1/2? A number line from negative 1 to 1 in halves. 1/6 3/8 3/4 ‐1/2

Arturiano [62]

Answer: 3/8

because 3/8 is .375
And 3/4 is .75
And 1/6 is .1666

1/2 is .50
3/8 is closest

5 0

3 years ago

How do I use 7,6,5,3 to make 75

Gennadij [26K]

(7+5) x 6 +3

or 3+ (7+5) x 6

8 0

3 years ago

PLEASE HELP ASAP!!!!!!!

love history [14]

Answer:

(a) Because it is an exterior angle

(b) The measure of angle 2 is 72°

Step-by-step explanation:

Angle 2 is an exterior angle because it is adjacent to the interior angle 1, and an exterior angle is equal to the sum of the measures of the two nonadjacent interior angles:

<2=30°+42°

<2=72°

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4 years ago

3/5 - 2/5 please help

Oduvanchick [21]

3/5 - 2/5 = 1/5

I hope that helps!

8 0

3 years ago

Read 2 more answers