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3 years ago

Which of the following is not equivalent to x - y + z?

2 answers:

5 0

You have to be sure the signs are the same. It doesn't matter the order.
The third choice has x as a negative so it is incorrect.

charle [14.2K]3 years ago

4 0

Y - x + z

A good way to tackle this problem is to check for the signs of all the variables. In your original expression, x-y+z, x and y are positive and y is negative. In all of the given options, the expression y - x + z is the only one which doesn't have the same signs. Hence it is not equivalent to x - y + z.

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If s= the number of stamps that sara has, which mathematical sentence expresses the information?

Monica [59]

S*x!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

7 0

3 years ago

Please help and explain how you did it

jenyasd209 [6]

To determine the lengths of the sides from shortest to longest, you need to calculate the corresponding angles. The higher angles will correspond to longer sides.

To find the angles, you have to solve for x. You’re already given that angle A is 76. To find the others, you know that angle C is 180-(16x+16) since it’s supplemental to the exterior angle. Then, you know the sum of the angles of the entire triangle is 180, so add up A, B, and C

A+B+C=180
76+6x+(180-16x-16)=180
240-10x=180
-10x=-60
x=6

So to find angle B, you use 6x or 6(6)=36.

To find angle C, you use 180-(16x-16) or 180-16(6)-16=68

So now match up the angles with their corresponding sides to find the length from shortest to longest.

Angle A (76) corresponds with BC
Angle B (36) corresponds with AC
Angle C (68) corresponds with AB

Again, the higher the degree, the longer the corresponding side, so AC is shortest, AB is next, and BC is the longest.

5 0

3 years ago

PLEASE HELP ASAPPPP!!!!!!!!

Lisa [10]

Answer:

slope: 1.25

Part B: The order in which the points are given does not change the value of the slope

Step-by-step explanation:

Part A. Given two points we can find slope using the slope formula

$m = \frac{y_2-y_1}{x_2-x_1}$

Given the points ( -6, 1/2) and ( -4,3 )

We plug in the y values and x values (starting with the last point give )

$m=\frac{3-.5}{-4-(-6)} \\3-\frac{1}{2} =2.5\\-4-(-6)=2\\\frac{2.5}{2} =1.25\\$

so we can conclude that the slope of a line that passes through the points ( -6, 1/2) and ( -4,3 ) is 1.25

Part B. The order in which the points are given does not change the value of the slope

Observe -

* flip the order in which the points are given *

given (-4,3) and (-6,1/2)

we use the same formula

*plug in the y and x values starting with the last point*

$m=\frac{.5-3}{-6-(-4)} \\.5 - 3=-2.5\\-6-(-4)=-2\\\frac{-2.5}{-2} =1.25$

The slope still equals 1.25 meaning that the order in which the points are given does not matter.

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=%28%20%7Bx%7D%5E%7B2%7D%20%20%2B%206x%20-%205%29%20-%20%28%20%7B8x%7D%5E%7B2%7D%20%20-%207x%20

Gelneren [198K]

I believe this is the answer

7 0

3 years ago

1. What is the measure of an exterior angle of a<br>regular hexagon?

Serhud [2]

Answer:

720°

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← where n is the number of sides

A hexagon has 6 sides, hence n = 6, thus

sum = 180° × 4 = 720°

4 0

3 years ago

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