MATHEMATICS MIDDLE SCHOOL

Which of these is a point-slope equation of the line that is perpendicular to y-3=4(x-10) and passes through (-3,7)?A. y+7= -1/4(x-3)
B. y-7= -1/4(x+3)
C.y+7= 4(x-3)
D.y-7= -4(x+3)

Answers

Answer 1
Answer:

Answer:

B

Step-by-step explanation:

The point slope form of a line is (y-y_1)=m(x-x_1) where x_1=-3\ny_1=7. We can find the slope which is perpendicular to the slope of 4 in the equation y=4(x-10). Perpendicular slope is the negative reciprocal which is -1/4.

We write  

(y-7)=-(1)/(4)(x--3)\n(y-7)=-(1)/(4)(x+3)

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4.A small pizza has a diameter of 21 cm.

What is the approximate circumference of the pizza?\pi= 3.14.

Answers

Well, circumference formula is pi times diameter.
C= \pi d
So, all you have to do is multiply the given diameter by pi to get your circumference in centimeters.
21·3.14=65.94

Circumference is 65.94 centimeters

65.94cm

Graph the ordered pairs for y = 2x + 4 using x={−2, 1, 2} ? plz help!!

Answers

We want to graph the ordered pairs for the given line and domain.

The graph can be seen at the end of the answer.

Here we have the line:

y = 2*x + 4

And the domain x= {-2, 1, 2}

To get the ordered pairs, we just need to evaluate the line in the given values of x, we get:

for x = -2

y = 2*-2 + 4 = 0

The ordered pair is (-2, 0)

for x = 1

y = 2*1 + 4 = 6

The ordered pair is (1, 6)

for x = 2

y = 2*2 + 4 = 8

The ordered pair is (2, 8)

Now we just graph these points, as you can see below.

If you want to learn more, you can read:

brainly.com/question/20853486
(-2,0), (1,6), and (2,8)

What is the length of the radius, r?

Answers

The length of the radius would be 18cm long

Answer:

18 cm

Step-by-step explanation:

The circumference (C) of a circle is calculated as

C = 2πr ← r is the radius

Given

C = 36π, then

2πr = 36π ( divide both sides by 2π )

r = (36\pi )/(2\pi ) = 18

Write 1.33 as a percentage

Answers

1.33 as a percent would be ...................
133%
hope this helps!!!!!!!!!!!!

the ratio of boys to girls in a class is 7 to 11. if there are a total of 49 boys in the class , then how many boys and girls are there altogether ?

Answers

Answer:

There are 77 girls in the class when there are 49 boys.

Answer:

126 students

Step-by-step explanation:

Boys : Girls

7 : 11

How do you get from 7 to 49?

49 ÷ 7 = 7

Therefore, you should multiply the number of boys by 7.

Multiply:

7 : 11

7 × 7 = 49

49 : 11

Remember that whatever we do to the left, do to the right.

Multiply:

49 : 11

11 × 7 = 77

49 : 77

Now, let's add the number of boys and girls in the class to find the total number of students.

Add:

49 + 77 = 126

Therefore, there are 126 students in all.

Is 10 yards less than 360 inches

Answers

1\ yd=3\ ft\ \ \ and\ \ \ 1ft=12\ in\n\n10\ yd=10\cdot3\ ft=30\ ft=30\cdot12\ in=360\ in\n\nAns.\ 10\ yd\ \ \ equals\ \ 360\ in
10 yards= 30 feet (3 feet in 1 yard, so 10x3=30) 30 feet=360 inches (12 inches in 1 foot, so 30x12=360) They are equal
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