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Stells [14]
3 years ago
15

Write the equation of the line passing through the given pair of points. (-9, 7) and (-9, -1)

Mathematics
1 answer:
aksik [14]3 years ago
8 0
The first thing I should do with these two points is find the slope of the line.

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

m = (-1 - 7)/(-9 - -9)
m = -8/0

The slope is undefined. We cannot divide by 0. This makes sense because the points (-9, 7) and (-9, -1) would be right on top of each other.  This is a vertical line that has an x-intercept at -9. 

Your equation would be x = -9.
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The area of a circle is 16 pi ft? What is the circumference of the circle? Explain.​
agasfer [191]

Answer:Explanation: The area of a circle is πr2 where r is the radius. Dividing both sides by π we find r2=16=42 and hence r=4

Step-by-step explanation:

5 0
2 years ago
Using the order of operations, what should be done first to evaluate mc019-1.jpg?
stellarik [79]

Answer:

"Multiply –6 and 3"


Step-by-step explanation:

For order of operations, we follow the rule PEMDAS

  • We do PARENTHESIS first, then
  • Exponents, then
  • Multiplication, then
  • Division, then
  • Addition, then
  • Subtraction

In this problem, we have parenthesis, so (-6)(3) should be done first.

Hence, we should multiply -6 and 3.

8 0
3 years ago
Read 2 more answers
Bananas cost $1.15 per pound. Jose bought 2.4 pounds of bananas. How much did it cost?
Serggg [28]

<em>Answer:</em>

<em> $ 2.76</em>

<em>Step-by-step explanation:</em>

<em>Hi there !</em>

<em>1 pd ........... $1.15</em>

<em>2.4pd .........$ x</em>

<em>x = 2.4×1.15/1</em>

<em>= $ 2.76</em>

<em>Good luck !</em>

4 0
3 years ago
30 POINTS NEED HELP
KatRina [158]

a. The expression y=5x represent the number of small marbles she has.

b. The expression z=3x+2 represents the number of large marbles she has.

c. Amy has 310 small marbles, 62 medium marbles and  188 large marbles.

Step-by-step explanation:

a. Let x represent the number of medium marbles Amy has. Write an algebraic expression to represent the number of small marbles she has.

Medium marbles = x

Let,

Small marbles = y

According to given statement;

She has five times as many small marbles as medium marbles.

y = 5x        Eqn 1

The expression y=5x represent the number of small marbles she has.

b. Write an algebraic expression to represent the number of large marbles she has.

Let,

Large marbles = z

The number of large marbles is two more than three times the number of medium marbles.

z = 3x+2        Eqn 2

The expression z=3x+2 represents the number of large marbles she has.

c. If Amy has a total of 560 marbles, how many of each size does she have?

x+y+z= 560     Eqn 3

Putting value of y and z from Eqn 1 and 2 in Eqn 3

x+(5x)+(3x+2)=560\\x+5x+3x+2=560\\9x=560-2\\9x=558

Dividing both sides by 9

\frac{9x}{9}=\frac{558}{9}\\x=62

Putting x=62 in Eqn 1

y=5(62)\\y=310

Putting x=62 in Eqn 2

z=3(62)+2\\z=186+2\\z=188

Amy has 310 small marbles, 62 medium marbles and  188 large marbles.

Keywords: linear equation, substitution method

Learn more about substitution method at:

  • brainly.com/question/11416224
  • brainly.com/question/11638377

#LearnwithBrainly

5 0
3 years ago
C is the midpoint of ab. Ac = 5x-13, cb = 4x+7. What is the length of ac
krek1111 [17]
AC in this problem will equal 87. If the (units) is where you put the put units like feet, inches if there is units.

3 0
3 years ago
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