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2 years ago

I NEED HELP PLEASE, THANKS! :)

Mathematics

1 answer:

Harman [31]2 years ago

5 0

Answer:

7i + 11j

Step-by-step explanation:

DE = 8i + 6j - i + 5j

= 7i + 11j

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30,45,x,100; the mean is 60

Andrei [34K]

if there are 4 numbers that average to 60, when mutiplied they must come up to: 60*4= 240

100+30+45= 175

240-175= 65

PROOF:

100+30+45+65= 240

240÷ 4

= 60

6 0

2 years ago

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The perimeter of (the distance around) ABCD is 66, and DC is twice as long as CB. How long is AB?

ArbitrLikvidat [17]

Answer:

$AB=22\ units$

Step-by-step explanation:

we know that

In this problem ABCD is a rectangle

DC=AB

BC=AD

Let

BC ---> the length of rectangle

DC ---> the width of rectangle

we know that

The perimeter of rectangle is equal to

$P=2(BC+DC)$

we have

$P=66\ units$

$66=2(BC+DC)$

simplify

$33=BC+DC$ ----> equation A

$DC=2BC$ ----> equation B

substitute equation B in equation A

$33=BC+2BC$

Solve for BC

Combine like terms

$33=3BC$

Divide by 3 both sides

$BC=11\ units$

<em>Find the value of DC</em>

$DC=2BC$ ----> $DC=2(11)=22\ units$

Remember that

DC=AB

therefore

$AB=22\ units$

3 0

2 years ago

What is the equation of the line that passes through the points (3,1) and (2,-4)

Ainat [17]

Answer:

The answer is in the media.Good luck!

4 0

2 years ago

Compare the value of the 2s and 5s in 55,220

Mademuasel [1]

Well the 2 in the tens place is ten times as many as the 2 in the hundreds place.Also the 5 in the thousand place is 10 times as many as the 5 in the ten thousand place

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Becky is writing a coordinate proof to show that the diagonals of a parallelogram bisect each other. She starts by assigning coo

Darya [45]

Answer:

Read Under

Step-by-step explanation:

Just did the quiz. First one is "a + b"

Second spot put "a+b/2"

Third put "c/2"

Finally put "CE" and then "BE"

8 0

2 years ago

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