Mathematics Middle School

Please help I need help with #17, 19, and 21

Answers

Answer 1

Answer:

Step-by-step explanation:

All the angles in a triangle have to add up to 180 degrees.

#17.)

45+50=95

180-95=85

x=85

#18.)

This one is a little different. The furthest two angles are complimentary which means that they add up to 180 degrees (a straight line.) Once you find the missing angle to that one, you can do the same thing as you did in #17.

180-118=62.

25+62=87

180-87=93

x=93

#21.)

For this one a slightly larger equation is needed. Since we don't have a definite number for the bottom left angle, we have to use x+2 as our number. We first have to find the bottom right angle though.

180-108=72

x+x+2+72=180

2x+74=180

2x=106

x=53

Answer 2

Answer

#17=85

#19=93

#21=53

Related Questions

What is the value of x?

A. 7
B. 10
C.18
D. 22

Answers

the answer would be c

Answer:

Step-by-step explanation:

Since all the expressions are on a straight angle (equalling 180) combine the expressions to form on big expression that is equal to 180 and solve.

6x - 10 + 4x + 6 + 7x + 14 = 180

17x + 10 = 180

- 10 -10

17x = 170

÷17 ÷17

x = 10

Hope this helps

jackie made bracelets for 8 days. when he was done he had 96 bracelets. write and equation to express how many bracelets jackie made each day.

Answers

96 divided by 8.
Answers 12 bracelets per day

Answer:

12 bracelets.

Explanation:

If we assume Jackie made the same number of beaded bracelets each day, we can divide the total number of bracelets 96, by the amount of days it took to make all the bracelets, 8. This gives us

[tex]\frac{96}{8}[/tex]=12

We can check the answer by working backwards. Each day 12 bracelets were made. There were 8 days. 12 × 8 = 96 . So for 8 days 12 bracelets were made giving Jackie 96 bracelets.

Pls answer and thanks!!

Use addition to solve the linear system of equations.

3x - y = 6

y = x - 4

Answers

Answer:

Problem:

Solve 3x−y=6;y=x−4

Steps:

I will try to solve your system of equations.

y=x−4;3x−y=6

Step: Solvey=x−4for y:

Step: Substitutex−4foryin3x−y=6:

3x−y=6

3x−(x−4)=6

2x+4=6(Simplify both sides of the equation)

2x+4+−4=6+−4(Add -4 to both sides)

2x=2

(Divide both sides by 2)

x=1

Step: Substitute1forxiny=x−4:

y=x−4

y=1−4

y=−3(Simplify both sides of the equation)

Answer: poop

Step-by-step explanation:

Answer:

103 and 77

Step-by-step explanation:

Supplementary angles add up to 180 degrees

A trapezoid was broken into a triangle and rectangle.

The area of the rectangle is cm2.
The area of the triangle is cm2.
The area of the trapezoid is cm2.

Answers

Answer:

Step-by-step explanation:

Base x Height = Area

10x12=120 the area of the rectangle is 120

area of the triangle is 28

sorry but I don't know the trapezoid

The area of the rectangle is 120 cm².

The area of the triangle is 24 cm².

The area of the trapezoid is 144 cm².

What is a trapezoid?

An open, flat object with four straight sides and one pair of parallel sides is referred to as a trapezoid or trapezium.

A trapezium's non-parallel sides are referred to as the legs, while its parallel sides are referred to as the bases. The legs of a trapezium can also be parallel. The parallel sides may be vertical, horizontal, or angled.

The area of a trapezoid is (1/2)×(sum of the two parallel sides)×height.

We know, the area of a triangle is (1/2)×base×height and the area of a rectangle is (length×width).

Therefore, From the given information,

The area of the triangle is, (1/2)×4×12 = 24cm².

And the area of the rectangle is, (10×12) = 120 cm².

Therefore, The area of the trapezoid is,

= (24 + 120) cm².

= 144 cm².

learn more about trapezoids here :

https://brainly.com/question/8643562

#SPJ7

What letter on the map represents the Coral Sea?
Group of answer choices

B

A

C

D

Answers

Answer: A

Step-by-step explanation:

a is the correct answer

HELP HELP HELPPPPPPP

Answers

Answer:

5/8

Step-by-step explanation:

Answer:I cant do this sorry but good luck!

Step-by-step explanation:

how many vertices AND faces does this shape have ? (NO LINKS)

Answers

Answer:

5 faces and 6 vertices

Step-by-step explanation:

Answer:

There are 6 vertices and 5 faces

What is the M.A.D. of this data set? {2, 6, 6, 7, 9}

Answers

Answer:

1.6

Step-by-step explanation:

The mean deviation is a measure of dispersion, A measure of by how much the values in the data set are likely to differ from their mean. The absolute value is used to avoid deviations with opposite signs cancelling each other out.

Answer:

6 Is the m.a.d of it

Study the expression below.
6 − 2 · 3² + 4
What is the value of the expression?

Answers

Answer:

-8

Step-by-step explanation:

6 + 4 = 10

2.[tex]3^{2}[/tex]= 18

10 - 18 = -8

the value/answer of the expression is -8

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