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3 years ago

I need Geometry help!!!!

Mathematics

1 answer:

Goryan [66]3 years ago

5 0

What we know:
1. y = 2x because angles facing each other are equal to each other
2. A straight line means 180 degrees.

Steps:
y + (x + y + 5) = 180
2y + x = 175
2 (2x) + x = 175
5x = 175
x = 35
y = 2 (35) = 70

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-7x + 2y = -5 y = -7x + 8 explain how please

Fiesta28 [93]

Answer:

x = 1 and y =1

Step-by-step explanation:

y = -7x + 8

sub into other eq

-7x + 2(-7x + 8) = -5

-7x - 14x + 16 = -5

-21x = -21

x - 1

y = -7(1) + 8

y = 1

7 0

3 years ago

If AD is the altitude to BC, what is the slope of AD? A. 1/3 B. 2/3 C. 3 D. −1/3

liberstina [14]

9514 1404 393

Answer:

C. 3

Step-by-step explanation:

AD is perpendicular to BC, so its slope will be the opposite of the reciprocal of the slope of BC.

The slope of BC can be found from the slope formula:

m = (y2 -y1)/(x2 -x1)

m = (-1 -2)/(3 -(-6)) = -3/9 = -1/3

Then the slope of AD is ...

-1/(-1/3) = 3

6 0

3 years ago

Which values of a and b make the following equation true? (5x7y2)(-4x4y5)=-20xayb

Kaylis [27]

Answer:

The values of a and b are a = 11 , b = 7

Step-by-step explanation:

* Lets explain how to solve the problem

* In the exponential functions we have some rules

1- In multiplication if they have same base we add the power

# Ex: b^m × b^n = b^(m + n) ⇒ b is the base , m and n are the powers

2- In division if they have same base we subtract the power

# Ex: b^m ÷ b^n = b^(m – n) ⇒ b is the base , m and n are the powers

3- If we have power over power we multiply them

# Ex: (b^m)^n = b^(mn) ⇒ b is the base , m and n are the powers

* Lets solve the problem

∵ The equation is $(5x^{7}y^{2})(-4x^{4}y^{5})=-20x^{a}y^{2}$ ⇒ (1)

- At first multiply the coefficients

∵ -4 × 5 = -20

- Multiply the base x

∵ $(x^{7})(x^{4})=x^{7+4}=x^{11}$

- Multiply the base y

∵ $(y^{2})(y^{5})=y^{2+5}=y^{7}$

∴ $(5x^{7}y^{2})(-4x^{4}y^{5})=-20x^{11}y^{7}$ ⇒ (2)

- By comparing (1) and (2)

∴ a = 11 and b = 7

* The values of a and b are a = 11 , b = 7

5 0

3 years ago

Read 2 more answers

Choose all that applies help asap

melamori03 [73]

Answer:

idk maybe its c

Step-by-step explanation:

4 0

3 years ago

Mary and dan went to a bookstore. mary bought 2 notebooks and 3 pens for $14.50. dan bought 1 notebook and 2 pens for $7.50. how

never [62]

Let $n,p$ be the cost, respectively, of a notebook and a pen. If you buy 2 notebooks and 3 pens (which we know is a cost of $14.50), you spend $2n+3p$