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3 years ago

True or False: in a table of a proportional relationship, the ratio or y/x is constant.

Mathematics

1 answer:

musickatia [10]3 years ago

3 0

Answer:

True

Step-by-step explanation:

Say u had a question like this

"Maddy went to get 5 things from the store.When she got back she bought 10 more items . how many more items were bought

u would set it up like:

5 x

_= _

10 100

Times 100 and 5 and divide by 10

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39. Solve this system: 3x+y=-7 . 4x-y=14A. (–1, 10)B. (1, –10)C. (–1, –10)D. no solution

valkas [14]

Given,

The linear pair of the equation is,

$\begin{gathered} 3x+y=-7 \\ 4x-y=14 \end{gathered}$

Required

The solution of the linear equation.

Taking the equation first as,

$\begin{gathered} 3x+y=-7 \\ y=-7-3x \end{gathered}$

Substituting the value of y in second equation then,

$\begin{gathered} 4x-y=14 \\ 4x+7+3x=14 \\ 7x+7=14 \\ 7x=7 \\ x=1 \end{gathered}$

Substituting the value of x in first equation then,

$\begin{gathered} 3x+y=-7 \\ 3(1)+y=-7 \\ y=-7-3 \\ y=-10 \end{gathered}$

Hence, the solution of the system is (1, -10).

8 0

1 year ago

Which of the following is another way to express the equation 8 - (-) = 43?

Olin [163]

Question:

Which of the following is another way to express the equation 8 - (-d) = 43?

A.8-d=43

B.-d+8=43

C.-8+d=43

D.8+d=43

Answer:

8 + d = 43 is another way to express the given equation

Solution:

Consider the given equation

$8 - (-d) = 43$

We have to find the another way to express the above equation

We know that,

We we multiply negative sign number by another negative sign number, then the result is positive sign number

Therefore from given,

$-(-d) = -1 \times -d = d$

Thus the given equation becomes,

8 + d = 43

Thus option D is correct

6 0

4 years ago

The area of a rectangular wall of a barn is 90 square feet. It’s length is 8 feet longer than twice it’s width. Find the length

vlada-n [284]

Answer: The answer is that the length is square ft, and the width is .

Step-by-step explanation:

5 0

3 years ago

Factorise a^2-2ab+b^2-c^2

anygoal [31]

Answer:

(a-b-c)(a-b+c)

Step-by-step explanation:

a^2-2ab+b^2-c^2

(a-b)^2-c^2

(a-b-c)(a-b+c)

7 0

3 years ago

On a 4 1 2 hour trip, Leslie drove 2 3 of the time. For how many hours did Leslie drive?

valentina_108 [34]

Answer:

She drove 3 hours

Step-by-step explanation:

Leslie drove 2/3 of the 4 1/2 hours trip. To determine how long she drove, multiply these numbers together.

2/3 * 4 1/2

We need to change the second number to an improper fraction

4 1/2 = (2*4 +1)/2 = 9/2

2/3 * 9/2 = 9/3 = 3

She drove 3 hours

5 0

3 years ago