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3 years ago

Suppose that 21 inches of wire costs 63 cents.

Mathematics

1 answer:

Sergio [31]3 years ago

4 0

<h2>Answer : 144 cents</h2>

Step by step explanation

Given: cost of 21 inches of wire costs 63 cents

Cost of 1 inch wire = 63/21 = 3 cents

Cost of 48 inches of wire = 48×3 = 144 cents

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The midpoint of AB is M(-5,1). If the coordinates of A are (-4,-5), what are the coordinates of B?

Elenna [48]

ANSWER:

The midpoint of AB is M(-5,1). The coordinates of B are (-6, 7)

SOLUTION:

Given, the midpoint of AB is M(-5,1).

The coordinates of A are (-4,-5),

We need to find the coordinates of B.

We know that, mid-point formula for two points A $(x_{1}, y_{1})$ and B $(x_{1}, y_{2})$ is given by

$M\left(x_{3}, y_{3}\right)=\left(\frac{x_{1}+x_{2}}{2}, \frac{y_{1}+y_{2}}{2}\right)$

Here, in our problem, $\mathrm{x}_{3}=-5, \mathrm{y}_{3}=1, \mathrm{x}_{1}=-4 \text { and } \mathrm{y}_{1}=-5$

Now, on substituting values in midpoint formula, we get

$(-5,1)=\left(\frac{-4+x_{2}}{2}, \frac{-5+y_{2}}{2}\right)$

On comparing, with the formula,

$\frac{-4+x_{2}}{2}=-5 \text { and } \frac{-5+y_{2}}{2}=1$

$-4+\mathrm{x}_{2}=-10 \text { and }-5+\mathrm{y}_{2}=2$

$\mathrm{x}_{2}=-6 \text { and } \mathrm{y}_{2}=7$

Hence, the coordinates of b are (-6, 7).

5 0

4 years ago

Pls help me !!!!! Find the value of x. Then classify the triangle.

morpeh [17]

Answer:

x = 13 isosceles

x= 60 equilateral

Step-by-step explanation:

154 + 13 = 167

180 - 167 = 13

x = 13 degrees

7. 180 / 3 = 60

8 0

2 years ago

What is x? -10 - x = -4

Musya8 [376]

Answer:

x = -6

Step-by-step explanation:

-10-x=-4 Add 10 to both sides...

-x=6 Divide both sides by -1...

x=-6

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3 years ago

What is the answer to 8d+0

vlabodo [156]

Answer:

Step-by-step explanation:

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3 years ago

Ratio of the number of students in art class to the number of students in gym class was 2:7, however art class is small, and gym

xenn [34]

Semester 1:

let the number of students in the art class be 2a, and the number of the students in the gym class be 7a. (check: the ratio is 2a:7a = 2:7)

so the total number of students is 9a.

semester 2:

the 9a students are go to the art class and gym class at a a ratio of 5: 4,

so 5a students go to the art class, and 4a students go to the gym class.

75 students are in art class in second semester means that 5a=75,

so a=75/5=15.

In the 1st semester the number of students was:

art class: 2a=2*15=30

gym class: 7a=7*15=105

7 0

3 years ago