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sergeinik [125]
2 years ago
11

You have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both machines. How much time should yo

u spend on each machine?A photo shows an elliptical trainer marked as 8 calories per minute and a stationary bike marked as 6 calories per minute.
Mathematics
1 answer:
FromTheMoon [43]2 years ago
4 0

Answer

8(40-y) + 6y =300

320 - 8y + 6y =300

-2y=-20

y=10

This leaves x to be 30.

You should spend 30 minutes on machine 1 and 10 minutes on machine 2.

Step-by-step explanation:

You might be interested in
Barbra can walk 3,200 meters in 24 minutes. How far can she walk in three minutes.
lisabon 2012 [21]

Answer:

Step-by-step explanation:

To find how far she can walk in 3 minutes, we need to find how fast she can walk in 1 minutes. We do this by dividing the distance she walked by the time she walked. Lets do so.

3200/24=133.33

She walks 133.33 meters per minute. Now to find her distance in 3 minutes w multiply this number by 3.

133.33*3=400

Barbra walks 400 meters every 3 minutes.

3 0
3 years ago
6ft to 8yd as a fraction in simplest form
raketka [301]
Must be in the same units
6 ft/ 24 ft   (8yds x 3 = 24 ft)
\frac{6}{24} =  \frac{1}{4}

Let's use yards instead
6 ft = 2 yds
so 
2 yds/8 yds  again is 1/4
8 0
3 years ago
The Jackson family is putting down flooring in part of their basement. The floor in this part of the basement measures 10 feet w
bixtya [17]

10x20x2=$400

All you have to do is find the area of the floor(10x20=200),then you just multiple the area by the cost(200x$2=$400),and that is how you find the cost.

7 0
3 years ago
On a 40 question test students gain 6 points for each correct answer and lose 0.5 points on each incorrect answer. If everyone r
juin [17]

Answer:

\text{r}=5.5\text{c}-20

Step-by-step explanation:

GIVEN: On a 40 question test students gain 6 points for each correct answer and lose 0.5 points on each incorrect answer. If everyone required to give an answer to each question.

TO FIND: the formulas that describes how a student's raw score, r, depends on the number of correct answers he or she provided, c.

SOLUTION:

Total number of incorrect questions =40-\text{c}

Total marks deducted due to incorrect question =(40-\text{c})\times0.5=20-0.5\text{c}

Total correct questions =\text{c}

Total marks scored =6\text{c}

Total raw marks \text{r}=\text{total marks gained}-\text{total marks deducted}

                           \text{r}=6\text{c}-(20-0.5\text{c})

                           \text{r}=5.5\text{c}-20

ormulas that describes how a student's raw score, r, depends on the number of correct answers he or she provided, c is  \text{r}=5.5\text{c}-20

7 0
3 years ago
The same price of every item in a store is 85% of it usual price. ( please explain your answer because I don’t understand how to
Mademuasel [1]
85% is 0.85 decimals
85 percent of 30
30 * 0.85 = 25.50
30-25.50 = 4.50
Solution: after sale, it is $4.50
7 0
3 years ago
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