1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yan [13]
3 years ago
14

You have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both

Mathematics
1 answer:
Annette [7]3 years ago
6 0
A and b are the minutes spent on machine A and machine B, respectively.

a+b = 40
b = 40-a

8a + 6b = 300
8a + 6(40-a) = 300
8a + 240 - 6a = 300
2a = 60
a = 30
b = 40-a = 10

30 minutes on machine A and 10 minutes on machine B
You might be interested in
A line is drawn so that it passes through the points (-3, -1) and (4, 2).
marishachu [46]

Answer:

(A) \boxed{\bold{y=\frac{3}{7}x+\frac{2}{7}}}

(B) \boxed{\bold{2 \ = \ \frac{3}{7} * \ 4 \ + \ \frac{2}{7}  }}

Explanation:

(A) Slope: y = mx + b

m = 3/7

b = 2/7

Slope = \bold{\frac{y_2-y_1}{x_2-x_1}}

\bold{\left(x_1,\:y_1\right)=\left(-3,\:-1\right),\:\left(x_2,\:y_2\right)=\left(4,\:2\right)}

M = \bold{\frac{2-\left(-1\right)}{4-\left(-3\right)}: \ \frac{3}{7} }

Y intercept

\bold{y=\frac{3}{7}x+b}

Plug in \bold{\left(-3,\:-1\right)\mathrm{:\:}\quad \:x=-3,\:y=-1}

\bold{-1=\frac{3}{7}\left(-3\right)+b}

Isolate B

\bold{-1=\frac{3}{7}\left(-3\right)+b}

b = \bold{\frac{2}{7} }

(B) 4 = x, 2 = y

2 = 3/7 * 4 + 2/7

5 0
3 years ago
Read 2 more answers
Select all of the expressions which show how to convert 2.5 yards into inches.
PIT_PIT [208]

Answer:

90

Step-by-step explanation:

4 0
3 years ago
Find k such that f(x) is continuous at x=30
Maru [420]

Answer:

this is correct

Step-by-step explanation:

f continous in x=30 means that it should be the same value for 1.25 x 30 and 1.10 x 30 + k so k =4.5

5 0
3 years ago
HELP ME PLEASE I NEED ANSWERS REALLY FAST I'LL GIVE BRAINLIEST TO THE CORRECT ANSWER SO PLEASE HELP ME!!!!
inessss [21]

Correct answers in reasoning and statements together.

Please give brainliest thank you so much!!

Hope this helps!!

4 0
3 years ago
Read 2 more answers
Need help with number 43 and 45 and need to show the work
Alex787 [66]
43:
       Negative temperatures are basically the same as normal ones, although they go below zero, so they are still the same distance apart from zero, just on the left side of the number line.

      To find the answer find the difference between 30.5°C and 0 (which is 30.5).

      Next, find the difference between -122.2°C and zero (122.2)

       Finally, add 122.2 + 30.5 to find the total distances from the zero combined for the full distances apart from each other.

     (We add them because -122.2 to the left of zero, and 30.5 is on the right)

      You should get 152.7 as your answer.

45:
     I'm guessing since it is asking for the deepest point (-5315) from sea level (0), the answer is -5,315 feet

     *Remember 5,315 is negative because numbers below sea level are all negative*

     So the answer should be -5,315 feet deep. (I'm not sure how to show your work for that I'm guessing it is 0 - 5,315 at the slightest).

 *Hope this all helped :)*

5 0
3 years ago
Other questions:
  • Riley and Louie have a $5,000 to invest. They both invest at a 2.5% simple interest rate. What is the value of Louis investment
    13·1 answer
  • À television ser costs $350 cash. When
    6·1 answer
  • Claire has 10 necklaces to sell. She is selling 2 per hour. On your own, graph the situation and how many remaining necklaces sh
    6·1 answer
  • How do I factor this :)
    13·1 answer
  • If a Hummer travels 204.8 miles on 25.2 gallons of gas, what is the gas mileage in miles per gallon? Round to the nearest tenth.
    8·1 answer
  • Divide. Write the quotient in lowest terms.<br> Help PLSSS I will give brainest
    9·1 answer
  • The circumference of a circle is 22 meters. What is the approximate diameter of the circle?
    12·2 answers
  • I NEED HELP ASAP!What is the area of the triangle shown below? 10 10 12​
    9·2 answers
  • Help me pleaseee!!! just one more question-!!​
    10·1 answer
  • 568,319,000,000,000,000,000,000,000 in standard form
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!