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liraira [26]
3 years ago
14

Help on number 6 i don't understand how to do it and i got corrections so i need help to do them.

Mathematics
2 answers:
Mademuasel [1]3 years ago
8 0
The answer #6 is j. 100. He uses the treadmill for 40% so that means 60% of his exercise is not on the treadmill. 

40%= 40 mins 
60%= 60 mins
 total: 100%= 100 mins.
Hope this helps!
Katen [24]3 years ago
6 0
The answer should be J) 100 minutes.

This is because, if he uses 40% of his exercise on the treadmill, which he spends 40 minutes on, it means that 10% of his exercise takes 10 minutes (40% ÷ 4 is 10%, and 40 mins ÷ 4 is 10 minutes). To find 100% (his whole exercise routine) we have to do 10 mins x 10, which 100%. This means that he exercises for 100 minutes each day.
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Suppose that y varies directly with x and y=10 when x=20. What is y when x=15
Likurg_2 [28]

Answer:

y=kx

subst y=10 and x=20 into the above

<em>1</em><em>0</em><em>=</em><em>k20</em>

<em>k</em><em>=</em><em>1</em><em>0</em><em>/</em><em>2</em><em>0</em>

<em>k</em><em>=</em><em>1</em><em>/</em><em>2</em>

<em>therefore</em><em> </em><em>relationship</em><em>:</em><em> </em><em>y</em><em>=</em><em>1</em><em>/</em><em>2</em><em>x</em>

<em>subst</em><em> </em><em>x</em><em>=</em><em>1</em><em>5</em><em> </em><em>into</em><em> </em><em>the</em><em> </em><em>relationship</em>

<em> </em><em>y</em><em>=</em><em>1</em><em>/</em><em>2</em><em>(</em><em>1</em><em>5</em><em>)</em>

<em>y</em><em>=</em><em>7</em><em>,</em><em>5</em>

Step by step explanation:

  • Step 1: when they say y varies directly with x they mean<em> y is proportional to x</em>
  • step 2: so y=kx where <em>k is the constant</em>
  • step 3: is to substitute <em>y=10</em> and <em>x=20</em> into the above equation y=kx
  • step 4: you will end up with <em>10=k20</em> then divide both sides by 20 so that <em>k becomes the subject of the formula </em>
  • step 5: your answer from the above will be <em>k=10/20 </em>so the relationship is <em>y is directly proportional to 1/2 x </em>what you did here is that you substituted k for 1/2 in the equation in step 3
  • step 6: is to finally substitute x=15 into the equation <em>y=1/2x</em> to finally get your answer <em>y</em><em>=</em><em>7</em><em>,</em><em>5</em><em>.</em>
4 0
3 years ago
PWEASE HELP MWEEEEE UwU
Paha777 [63]

Answer: the second

one

Step-by-step explanation:

4 0
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You deposit $4300 in an account that earns 2% per year simple interest. The equation that represents this situation is: A(n) = 4
Likurg_2 [28]

Answer: $4902

Step-by-step explanation:

Amount = P (1 + rt)

= 4300 (1 + .02 * 7)

= 4300 (1 + .14)

= 4300 (1.14)

= 4902

3 0
3 years ago
A cube has how many vertices
Ulleksa [173]

Answer: 8 vertices

Step-by-step explanation: A cube has 6 square faces. Each segment formed by the intersection of 2 faces is called an edge so a cube has 12 edges. Each point formed by the intersection of 3 edges is called a vertex so a cube has 8 vertices.

3 0
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Which price choice is the lowest price per ounce? Choice A: 15 ounces of chocolate chips for $2.49 Choice B: 20 ounces of chocol
Kitty [74]
A=$2.49/15oz≈$0.166/oz  (17 cents per ounce to nearest cent)

B=$3.32/20oz=$0.166/oz  (same as above)

So A=B, they both has the same price per ounce.
6 0
3 years ago
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