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2 years ago

Prove to me that −1(x)=−x

Mathematics

1 answer:

JulsSmile [24]2 years ago

3 0

Answer:

It does

Step-by-step explanation:

Basically:

-1×x=-1x

When doing Algebra, You never write 1x, you just write x, so therefore it should not be -1x but -x

I hope this helped you, and please give be brainliest.

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Pls help me NO LINKS OR I WILL REPORT

Bingel [31]

Answer:

40 + x is correct!

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The expression x−y equals 0.7 if x and y have certain values. Evaluate the following expressions with the same values of x and y

lisov135 [29]

Answer:

-0.7

Step-by-step explanation:

$x-y=0.7$

You can choose any digits you wish for $x$ and $y$ but the difference must be 0.7. I chose 1.0 and 0.3.

$x=1\\y=0.3\\x-y=0.7\\\\y-x=\\0.3-1=\\-0.7$

3 0

2 years ago

HELP ME PLEASE True or false: z=−5 is a solution to the inequality −2|z−3|<−20.

Dovator [93]

your question: 

True or false: z=−5 is a solution to the inequality −2|z−3|<−20.

answer: 

-2|z-3|<-20

-------. -----

-2 -2

|z-3|<10

equation 1: equation 2:

z-3<10. z-3>-10

z<13 z>-13

So false, z=-5 is not a solution to the inequality.

hope this helps, have a great day! :)

7 0

2 years ago

The sides of a triangle are consecutive integers.if its perimeter is 126cm,find the lenghts of the sides.

Neko [114]

X + (x + 1) + (x + 2) = 126
3x = 123
x = 41
So the sides are 41, 42 and 43

3 0

3 years ago

What is the approximate area of the shaded portion of the diagram? (Use 3.14 as an estimate for pi.)

Nadusha1986 [10]

Answer:

218

Step-by-step explanation:

first find the area of the circle-

$A=\pi r^{2} \\A=\pi 10^{2} \\A=100\pi \\A=314$

to find the area of the triangle, we need the base and the height. The base we know is 16, since we don't know the height yet, use the Pythagorean theorem to find the height. One leg is 16 the hypotenuse is 20 (2* the radius).

$a^{2} +b^{2} =c^{2} \\a^{2} +16^{2} =20^{2} \\a^{2} +256=400\\a^{2} =144\\a=12$

Now I know the height is 12. Find the area of the triangle

$A=\frac{1}{2} bh\\A=\frac{1}{2} (16)(20)\\A=96$

subtract the area of the triangle from the area of the circle

314-96=218

6 0

2 years ago