Need help with math

Answers

Answer 1
Answer:

Answer:

what do you need help with?

Step-by-step explanation:


Answer 2
Answer:

Answer:

3x4x9x21=

Step-by-step explanation:


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Simplify 24 ÷ (-2)(3) + 7Simplify 24 ÷ (-2)(3) + 7

The graph shows the distance traveled by an Olympic-level sprinter over time during a race.Find the slope of the line. Enter your answer in the box.

Answers

Answer:10

Step-by-step explanation:

What is -7/9 in a decimal

Answers

Answer:

-0.78

Step-by-step explanation:

you would round the number up after you divide.

Answer: -0.77777777777778 or -0.77

Step-by-step explanation: you would divide the numerator by the denominator; you would divide 7 by 9 and get 0.77 then just add the negative sign in front of the zero.

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Answers

A transformation of a figure in which all of the dimensions of the figure are multiplied by the same scale factor is called a dilation.

Effect of Dilation on Perimeter

Whenever a figure is dilated by a scale factor, the perimeter of the figure changes according to the same scale factor.

Effect of Dilation on Area

When a figure is dilated by a scale factor of (a)/(b), the area of the figure is  dilated by a scale factor of (a^(2))/(b^(2))

Example-

Lets imagine a rectangle with length 10 cm and width 8 cm

So area becomes = 10*8 = 80 square cm

Lets suppose the rectangle is reduced by a scale factor of (1)/(2) to produce a new rectangle.

So we will find the square of scale factor = ((1)/(2))^(2)=(1)/(4)

Now to find the area of the new rectangle(dilated one) we will multiply the area of the original rectangle by 1/4

= 80*(1)/(4)=20

Hence, area becomes 20 square cm.

Solve each system of linear equations by substitution you will get an x, y point for solutionshow steps
y = x - 4 2x + y = 5


next set is
x + 4y = 6 y = -x + 3


next set is
x + 2y = 6 x - y = 3

next set is
3x - 2y = 9 y = 2x - 7

Answers

{y = x - 4    

                          => 2x+x-4=5 => 3x=9......x=3

{2x + y = 5                                                 y=3-4=-1

________________________________________________

{x+4y=6

{y=-x+3

=> x+4(-x+3)=6

   x-4x+12=6

-3x=-6

x=2

y=-2+3=1

y=1

___________________________________________________-

{x+2y=9

{x-y=3 .......x=3+y


3+y+2y=9

3y=6

y=2

x=3+2=5

x=5

_________________________________

{3x-2y=9

{y=2x-7

3x-2(2x-7)=9

3x-4x+14=9

-x=-5

x=5

y=2*5-7=10-7=3

y=3





Classify the triangle by its anglesA. acute
B. right
C. obtuse
D. scalene

Answers

It is a right triangle because of the square on the bottom left which represents a 90 degree angle.

Hope this helps.

70% of what number is 35 ?

Answers

70% = 0,7 = 7/10

7/10 * x = 35    | (*10/7)
7/10 * 10/7 * x = 35/1 * 10/7         7/10 * 10/7 => 1
1x = 35/1 * 10 / 7
x = (35*10)/7
x = 350 / 7
x = 50 

The number that is 70% of 3 is approximately 4.29. The calculation involves converting the percentage to its decimal form and then solving for the unknown value, which is the number we are trying to find.

To find the number that is 70% of 3, we can set up an equation using the concept of percentages.

Let x be the number we are looking for.

The equation can be written as:

70% of x = 3

To solve for x, we need to convert the percentage to its decimal form, which is 0.70.

0.70 * x = 3

Now, divide both sides of the equation by 0.70 to isolate x:

x = 3 / 0.70

x ≈ 4.285714285714286

Therefore, the number that is 70% of 3 is approximately 4.29. This means that if we take 70% of 4.29, we get 3. When we multiply 4.29 by 0.70 (70%), the result is approximately 3.

In conclusion, the number that is 70% of 3 is approximately 4.29. The calculation involves converting the percentage to its decimal form and then solving for the unknown value, which is the number we are trying to find.

To know more about percentage:

brainly.com/question/16797504


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