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3 years ago

Use subtraction to check addition problems 391+124=551

Mathematics

1 answer:

son4ous [18]3 years ago

3 0

Answer:

391+124=\=551

Step-by-step explanation:

subtract either the 124 or 391 from both sides.

391=427 which means they are not equal. so it has no solution.

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Find the slope of (-3,8)(5,-1)

Svetach [21]

Answer:

Step-by-step explanation:

(-1 - 8)/(5 + 3) = -9/8 is the slope

7 0

3 years ago

Please help with this!

Klio2033 [76]

Answer:

y = 8
RS = 51
ST = 29

Step-by-step explanation:

(a) You use the fact that the lengths RS and ST total the length RT.

RS +ST = RT

(6y+3) +(3y+5) = 80 . . . . . substitute the given values

9y +8 = 80 . . . . . . . . . . . . .simplify

9y = 72 . . . . . . . . . . . . . . . .subtract 8

72/9 = y = 8 . . . . . . . . . . . .divide by the coefficient of y

___

(b) Now, the value of y can be substituted into the expressions for RS and ST to find their lengths.

RS = 6y +3 = 6·8 +3

RS = 51

ST = 3y +5 = 3·8 +5

ST = 29

___

<em>Check</em>

RS +ST = 51 +29 = 80 = RT . . . . the numbers check OK

5 0

3 years ago

Two buses leave a station at the same time and travel in opposite directions. One bus travels 17 mi/h slower than the other. If

yarga [219]

Answer:

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3 0

3 years ago

Read 2 more answers

What is the area of the rectangle?

den301095 [7]

Answer:

$50\ units^{2}$

Step-by-step explanation:

Plot the figure to better understand the problem

see the attached figure

we know that

If the figure is a rectangle

then

$AB=CD \\AD=BC$

The area of the rectangle is equal to

$A=B*h$

where

B is the base

h is the height

the base B is equal to the distance AB

the height h is equal to the distance AD

Step 1

Find the distance AB

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

$A(-5,5)\\B(0,-5)$

substitute the values

$d=\sqrt{(-5-5)^{2}+(0+5)^{2}}\\d=\sqrt{(-10)^{2}+(5)^{2}}\\dAB=\sqrt{125}\ units$

Step 2

Find the distance AD

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

$A(-5,5)\\D(-1,7)$

substitute the values

$d=\sqrt{(7-5)^{2}+(-1+5)^{2}}\\d=\sqrt{(2)^{2}+(4)^{2}}\\dAD=\sqrt{20}\ units$

Step 3

Find the area of the rectangle

$A=AB*AD$

we have

$dAB=\sqrt{125}\ units\\dAD=\sqrt{20}\ units$

substitute

$A=\sqrt{125}*\sqrt{20}\\A=\sqrt{2,500}\\A=50\ units^{2}$

7 0

4 years ago

6th grade math! Help me please :)

GREYUIT [131]

Hey there!

The answer is D. 8,512

The value of 5 in Andrew’s number is in the tens place along with answer choices A, B, and C. The only number that has a 5 digit in the HUNDREDS value is D. 8,512

Hope this helped!

7 0

3 years ago