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3 years ago

You can buy 3 t-shirts for $22.50. write and solve a proportion that shows how many t-shirts you could buy with $110

Mathematics

1 answer:

AlexFokin [52]3 years ago

7 0

Answer:

14.6 T-Shirt

Step-by-step explanation:

Well, you divide 22.50 and 3 and you get 7.5.

Once you get 7.5 you divide it by 110 which is 14.6

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The ratio of blue marbles to red marbles in a box is 3 to 2. if there are 12 blue marbles in a box then how many red marbles are

valkas [14]

The answer is: 8 red marbles!

This is because the equation can be written out like this
Blue to red - 3:2
Now it is, blue to red - 12:x

We have to think, what is the difference from the first equation to the second. We know the number 3 times 4 = 12, so we would do the same for the red, 2 times 4=8

If this helped, give me brainliest :)

6 0

3 years ago

Read 2 more answers

Ben’s Video shack charges $1.50 to rent a video game for a night. Mr. Gareth’s Entertainments charges $5.00 plus $0.50 per night

Leya [2.2K]

Answer: 5 nights

Step-by-step explanation: Mr. Gareth's Entertainments has a one time fee of $5.00, then charges $0.50 per night for a game, while Ben's Video shack charges $1.50 to rent a video game for a night. We can set up equations for both places. We can let x = the amount of nights the game is being rented for. Mr. Gareth's Entertainments = $0.50x + $5.00 because $0.50 is being charged every night and $5.00 was charged only once. Ben's Video shack = $1.50x. We can make the equations equal to eachother, so $1.50x = $0.50x + $5.00

We can subtract by $0.50x both sides to make it so only one side will have x. This will make the equation easier to solve. By subtracting $0.50x from both sides, we get $1.00x = $5.00. Since we made x = the amount of nights the game is being renmted for, we know x = 5, so it would take 5 nights.

We can double check. $1.50 * 5 = $7.50

$0.50 * 5 = $2.50

$2.50 + $5 = $7.50

7 0

3 years ago

Both and tell why pls……..

RoseWind [281]

Answer:

4) A

5) E

Step-by-step explanation:

$\frac{x}{y}=\frac{1}{10} * \frac{z}{y}$

$\frac{x}{y} =\frac{1z}{10y}$

Cross multiply the equation and you get:

$10xy=zy$

Since $\frac{a}{b}=\frac{c}{d}$ is the same thing as $ad=bc$ , you can change the equation into $\frac{x}{z} =\frac{y}{10y}$

Cancel out the y on the top and bottom and you get 1/10

$\frac{2}{3} *\frac{x}{2} =5$ , simplify and you get $\frac{x}{3} =5$ so x=15

$\frac{1}{5} * 3(x)$ is equal to $\frac{1}{5} *3(15)$ after you plug in x, and that is equal to 9

7 0

3 years ago

9.8-7.5 how do I solve for this

nlexa [21]

Answer:

Its simple the anwser is 2.3

Step-by-step explanation:

9.8

-7.5=

2.3

8 0

3 years ago

The table below shows the radius y, in inches, created by growing algae in x days:

Pie

Part A. The correlation coefficient, denotes as R^2, is a measure of how well does the data point correlate with a given model or equation. The closer the R^2 is to 1, the better is the correlation. However, R2=1 is ideal for scatter plots. Using the MS Excel to execute the regression, the data points was fitted to a quadratic equation. The R2=0.9983. From the choices, the closest answer would be 1. But as stated previously, a value of 1 is ideal only. Therefore, the answer is most likely 0.94,

Part B. To determine the slope, the equation would be Δy/Δx. For x=5 and x=10, the slope would be

Slope = (3-1)/(10-5) = 2/5 or 0.4. This is the instantaneous rate of change at the interval of 5 to 10 days.

Part C. The difference between causation and correlation is identifiable if you know the direct relationship between the variables. In this case, the increase in radius is not caused by time. The problem does not state so. But we know from the trend shown on a graph, that there is a correlation between these variables. Therefore, the answer is correlation.

5 0

3 years ago