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3 years ago

Help? how do I solve these problems? ??

Mathematics

1 answer:

saveliy_v [14]3 years ago

5 0

15A- Damon earns around $320 (32 x 10)
15B - Damon earns $344.00 a week (32 x 10.75)
15C - Yes

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A floor 10m by 40m is covered by square tiles 20cm. How many tiles are needed to cover the floor?

Lady_Fox [76]

Answer:

10,000

Step-by-step explanation:

We can find the area of the floor in cm^2 and divide by the are of 1 tile in cm^2.

1 m = 100 cm

10 m = 1000 cm

40 m = 4000 cm

area of floor = LW = 1000 cm * 4000 cm = 4,000,000 cm^2

area of tile = s^2 = (20 cm)^2 = 400 cm^2

number of tiles = 4,000,000/400 = 10,000

Answer: 10,000 tiles

4 0

3 years ago

In the picture lines AB and CD are parallel. Find the measures of ∠BCD. HELP ASAP!!

liubo4ka [24]

Answer: angle BCD = 38 degrees

This is because angle ABC and angle BCD are alternate interior angles.

Alternate interior angles are congruent when we have parallel lines.

8 0

4 years ago

Read 2 more answers

If ABC=DEC b=48degree and E=x+4 <br> X=

MrRa [10]

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$x + 4 = 48$

Subtract sides 4

$x +4 - 4 = 48 - 4$

$x = 44°$

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6 0

3 years ago

What is the slope of a line that is perpendicular to the line shown.

sertanlavr [38]

Answer:

3/4

Step-by-step explanation:

First of all, we need to calculate the slope of the line shown. This can be computed as:

$m=\frac{\Delta y}{\Delta x}$

where

$\Delta y = y_2-y_1$ is the increment along the y-direction

$\Delta x = x_2 - x_1$ is the increment along the x-direction

We can choose the following two points to calculate the slope of the line shown:

(-3,2) and (0,-2)

And so, the slope of the line shown is

$m=\frac{-2-(2)}{0-(-3)}=-\frac{4}{3}$

Two lines are said to be perpendicular if the slope of the first line is the negative reciprocal of the slope of the second line:

$m_2 = -\frac{1}{m_1}$

Using $m_1 = -\frac{4}{3}$ , we find that a line perpendicular to the line shown should have a slope of

$m_2 = -\frac{1}{-4/3}=3/4$

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3 years ago

The scatterplot shows the ages and finishing times of seven men who ran a charity 5K run. Use the labeled points to create a lin

musickatia [10]

The correct option is (a) y=0.47x + 7.72

4 0

3 years ago