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Stolb23 [73]
4 years ago
11

Determine the value of y in the proportion 6y−10/5+7y =12 .

Mathematics
1 answer:
ira [324]4 years ago
5 0

its none of them? 6y - 10/5 +7y = 12     10 divided by 5 equals 2

it will now look like this: 6y - 2 + 7y = 12

then your going to want to add 2 to both sides of the equation.

it will now look like this: 6y -2 + 7y + 2 = 12 + 2 = 14

simplify: 6y + 7y = 14

add the like terms: 13y = 14


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Help Me! ASAP! What are all the possible values of a and b that make the equation 12x+24=ax+b have no solution?​
ipn [44]
A. a = 12, b = any number other than 24
5 0
3 years ago
5h+3 - j; use h = 6, and j = 1
olga55 [171]

Answer:

32

Step-by-step explanation:

lets substitute the appropriate values in the equation:

5h+3 - j    h= 6    j=1 , so we have:

5*6 +3 -1

30 +3 -1

32

7 0
3 years ago
Read 2 more answers
The surface area of a cube is increasing at a rate of 15 square meters per hour. At a certain instant, the surface area is 24 sq
algol13

Answer:

The volume of cube is increasing at a rate 7.5 cubic meter per hour.  

Step-by-step explanation:

We are given the following in the question:

Surface area of cube = 24 square meters.

Let l be the edge of cube.

Surface area of cube =

6l^2 = 24\\l^2 = 4\\l = 2

Thus, at that instant the edge of cube is 2 meters.

\dfrac{dS}{dt} = 15\text{ square meters per hour}\\\\\dfrac{d(6l^2)}{dt} = 15\\\\12l\dfrac{dl}{dt} = 15\\\\\dfrac{dl}{dt} = \dfrac{15}{12\times 2} = \dfrac{15}{24}

We have to find the rate of change in volume.

Volume of cube =

l^3

Rate of change of volume =

\dfrac{dV}{dt} = \dfrac{d(l^3)}{dt} = 3l^2\dfrac{dl}{dt}\\\\\dfrac{dV}{dt} = 3(2)^2\times \dfrac{15}{24} \\\\\dfrac{dV}{dt} = 7.5\text{ cubic meter per hour}

Thus, the volume of cube is increasing at a rate 7.5 cubic meter per hour.

4 0
3 years ago
Please can someone help me with both questions. Thank you. Work is due tomorrow.
Mariulka [41]
So let's begin!
So the length is 25 and the entire perimeter is 106. Lets put these both of these numbers as information we know.

We know the length is 25.
We know the full perimeter is 106.
We also know a rectangle has 2 pairs of congruent sides.

Okay so, the length is 25.
Since there are two sides that are the same we would multiply 25 by 2 to get 50.

Now we know 2 sides out of the four sides on a rectangle.

106 is the final perimeter, if we subtract 50 from 106, we get 56. That is the measurement for both sides we're missing but we need to know the width for just one side.
So we divide 56 by 2 to get 28.
The width is 28.

Heres the show your work part:

25 x 2 = 50
Gets both lengths for rectangle.

106 - 50 = 56
Gets the product for the widths.

56 / 2 = 28
Gets the width of just one side.

Your final answer: 28
7 0
3 years ago
Is It a Function?
inn [45]
For something to be a function there can only be one x value for every y value (meaning x can’t repeat). To see if the graphs are functions you need to perform the vertical line test. This is where you scan an imaginary line across the graph and if the line passes through two points at the same time, that graph is not a function. This would mean that for the graphs, only graph B is a function. For the mapping part, if an x value has more than two lines attached to it, it’s not a function. This means that mapping A is a function because it only had one line for every x value whereas mapping B had x value 5 with two lines instead of one. For the table, it’s a function if the x value isn’t repeated. This means that table B is a function because no x value repeats whereas in table A the x value 2 repeats twice. That leaves graph A, mapping B, and table A as ‘not a function’. Hope this helped.
3 0
4 years ago
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