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4 years ago

Evaluate the expression 18−(−4)−8 by rewriting the subtraction as addition

Mathematics

2 answers:

umka2103 [35]4 years ago

5 0

18-(-4)-8 is the same as 18+4-8, or 14. You can't write the -8 as addition, but you can write the first part.

Hopefully this helps! Let me know if you have any more questions.

Nastasia [14]4 years ago

4 0

I think it’s 20 but I’m not for sure

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damaskus [11]

1 b , 2 a ...................

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3 years ago

0.52+0.15=0.52+x????

pychu [463]

What I did is to add 0.52
+0.15
then try to find what could equal the same amount with 0.52

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3 years ago

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John was visiting four cities that form a rectangle on a coordinate grid at A(0, 4), B(4, 2), C(1, -4) and D(-3, -2). What is th

allsm [11]

Answer:

$Area = 30$

Step-by-step explanation:

Given

Rectangle coordinates

$A = (0,4)$

$B = (4,2)$

$C = (1,-4)$

$D =(-3,-2)$

Required

The area of the rectangle

The area is calculated as:

$Area = Length* Width$

The length of the rectangle will be represented as:

$Length = AB = CD$

And the width is:

$Width = BC = AD$

Calculate distance AB using:

$AB = \sqrt{(x_1 - x_2)^2 +(y_1 - y_2)^2 }$

Where:

$A = (0,4)$ --- $(x_1,y_1)$

$B = (4,2)$ $--- (x_2,y_2)$

$AB = \sqrt{(0 - 4)^2 +(4 - 2)^2 }$

$AB = \sqrt{(- 4)^2 +(2)^2 }$

$AB = \sqrt{16 +4 }$

$AB = \sqrt{20}$

Calculate distance BC using:

$BC = \sqrt{(x_1 - x_2)^2 +(y_1 - y_2)^2 }$

$C = (1,-4)$ $---(x_1,y_1)$

$B = (4,2)$ $--- (x_2,y_2)$

$BC = \sqrt{(1 - 4)^2 +(-4 - 2)^2 }$

$BC = \sqrt{(- 3)^2 +(-6)^2 }$

$BC = \sqrt{9 +36}$

$BC = \sqrt{45}$

So, the area is:

$Area = Length * Width$

$Area = AB * BC$

$Area = \sqrt{20} * \sqrt{45}$

$Area = \sqrt{20 * 45}$

$Area = \sqrt{900$

$Area = 30$

4 0

3 years ago

H e l p m e p l e a s e

photoshop1234 [79]

Answer:

EcD= 52 DCB=128

Step-by-step explanation:

First, let's find out what x equals and what (x+11) equals

$(x+11)+(3x+5)=180\\4x+16=180\\4x=164\\x=41$

And therefore...

$x+11=52$

Now angle ecd is a vertical angle we just found.

So angle ECD= 52 degrees

And agles ECD and DCD and supplimntary

$52+?=180\\DCB=128$

5 0

2 years ago

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The picture is sideways. Please help, much appreciated! BRAINLIEST WILL BE GIVEN FOR THE HELP (SHOW WORK).

myrzilka [38]

Answer:

14 m

Step-by-step explanation:

Let the shorter side be x

Then the longer side is x + 1

<u>Perimeter is:</u>

P = 2( x + x + 1) = 2(2x + 1) = 4x + 2

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<u>Solve the inequality:</u>

4x + 2 ≤ 60
4x ≤ 58
x ≤ 58/4
x ≤ 14.5

Since x is the integer, its greatest value is 14 m

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3 years ago

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