3 years ago

Hey can someone help stats

Mathematics

1 answer:

dangina [55]3 years ago

7 0

What’s the question?

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Only need help on 30 and 36!!! please help 7 grade math

Igoryamba

Answer:

30) =

36) >

Explanation:

|x| means the absolute value and cannot be negative, so |5| and |-5| are the same.

6 0

2 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%20%7B75%7D%5E%7B2%7D%20%2B%2025%20-%20750" id="TexFormula1" title=" {75}^{2} + 25 - 750" alt=

frez [133]

your answer is 4900

3 0

3 years ago

Find the length and area of rectangle whose diagonal is =26cm and breath is =10cm

givi [52]

Answer:

240cm²

explanation

Diagonal ²=Length ²+breath ²

26²=10²+length ²

676=100+length ²

576=length ²

length=24cm

Area of a rectangle=length×breath

Area=24×10

=240cm²

3 0

3 years ago

Someone please help me

Mars2501 [29]

Answer:

x=-1,-2

Step-by-step explanation:

Multiply the given equation with (x+1) on both sides. We'll get,

x+2/x=-3

or,x^2+2=-3x

or,x^2+3x+2=0

or,x^2+2x+x+2=0

or,x(x+2)+1(x+2)=0

or,(x+2)(x+1)=0

or,x=-2,-1

4 0

2 years ago

Prove that sin20sin40sin60sin80=3/16

never [62]

We'll use the following properties of sine and cosine to prove this:

$sin(a)\cdot sin(b) = \frac12(cos(a-b) - cos(a+b))$

$cos(a)\cdot cos(b) = \frac12(cos(a+b) + cos(a-b))$

$cos(180+a) = cos(180-a)$

Then it's just a matter of filling it in...

sin20sin40 * sin60sin80 = 1/2(cos20 - cos60) * 1/2 (cos20 - cos140) =

1/8( cos40 + 1 - cos160 - cos120 - cos40 - cos80 + cos80 + cos200) =

1/8(1 - cos160 - cos120 + cos200) =

1/8(1 - cos160 - cos120 + cos160) =

1/8(1 - cos120 ) = 1/8( 1 + 1/2 ) = 3/16

5 0

3 years ago