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3 years ago

(17) geometry help pls

Mathematics

1 answer:

Semenov [28]3 years ago

8 0

Notice how the y coordinates of points Z and X are both b. It doesn't matter what the x coordinates are. Because both y coordinates are b, this means we have a horizontal line of slope 0.

For points Y and W, the x coordinate is both 'a'. The y coordinate doesn't matter. Since the x coordinate here is both 'a', we have a vertical line with an undefined slope.

ZX is a completely horizontal line
YW is a completely vertical line
Therefore, the diagonals are perpendicular

Note: we can't use the negative reciprocal idea since there is no reciprocal of 0<span />

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Two times the sum of a number and 7

GenaCL600 [577]

Answer:

2(x+7)

Step-by-step explanation:

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3 years ago

Calculating area of rectangle

PSYCHO15rus [73]

Answer:

$Area = 216.108cm^2$ --- You

$Area = 216.940cm^2$ --- Another student

Reason: Because there is a variation in the given dimensions

Step-by-step explanation:

Given

Your measurement

$Length = 20.70cm; Width =10.44cm$

Another students'

$Length = 20.74cm; Width =10.46cm$

Solving (a): The area

Area is calculated as:

$Area = Length * Width$

For you

$Area = 20.70cm * 10.44cm$

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For the other student

$Area = 20.74cm * 10.46cm$

$Area = 216.940cm^2$

Solving (b): Reason for the variation in the areas

The given measurements are estimates of the dimensions of the rectangle.

Since there is a variation in the estimates, there will be some level of variation in the calculated area.

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3 years ago

Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours. Together the

klasskru [66]

The rate charged per hour by each mechanic was: x = 75 $ / hr and y = 115 $ / hr.

<h3>What is a system of equations?</h3>

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

Given;

The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours.

Together they charged a total of $3225.

For this case we have the following variables:

x be the amount of $ / hr that the mechanic obtains 1.

y be the amount of $ / hr obtained by mechanic 2.

An equation to express this would be:

x + y = 190

20x + 15y = 3225

Solving the system of equations we have:

20x + 15(190 -x) = 3225

20x + 2850 - 15x = 3225

5x = 375

x = 75

simililary

y = 190 - x

y = 115

Hence, the rate charged per hour by each mechanic was:

x = 75 $ / hr

y = 115 $ / hr

Learn more about equations here;

brainly.com/question/10413253

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2 years ago

PLEASE I NEED HELP RN

Alona [7]

Answer:

Number A is correct I think, coz if uu take the feet convert them into decimals u'll get accurate answers

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3 years ago

You can buy 7 pillows at jensen's for the same price that you can buy 6 pillows at harrison's. If one pillow costs $21.21 at har

kotykmax [81]

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3 years ago

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