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3 years ago

A runner burned 120 calories on a 1.6 km run .how many calories would they burn on a 5km run

Mathematics

1 answer:

sergey [27]3 years ago

4 0

Answer:

375 calories

Step-by-step explanation:

given:

1.6 km ----> burns 120 calories

1 km ----> burns (120 / 1.6) calories

5 km ----> burns (120 / 1.6) x 5 = 375 calories

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Tim predicts he will get 98 points on the next exam. If Tim actually earned 62 points, what was Tim's percent error? Round your

Mariana [72]

98 - 62 = 36

36/98 x 100 = 36.7%

answer:

Tim was 36.7% error

5 0

3 years ago

Read 2 more answers

A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 27 com

Harrizon [31]

Answer:

Tires that wear out by approximately 24307.8 miles will be replaces free of charge.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 27,000 miles

Standard Deviation, σ = 2100 miles

We are given that the distribution of life expectancy is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.10

$P( X < x) = P( z < \displaystyle\frac{x - 27000}{2100})=0.10$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 27000}{2100} = -1.282\\\\x = 24307.8$

Tires that wear out by approximately 24307.8 miles will be replaces free of charge.

4 0

4 years ago

please help :) Which expression is equivalent to 7 × 7 × 7? A.) 3 times 7 B.) 3 to the 7 power C.) 7 times 7 times 7 times 3 D.)

Anika [276]

Answer: D) 7 to the 3 power.

Step-by-step explanation:

7 0

4 years ago

Perform the specified operations on the polynomials: Subtract 2x2−3xy+4y2from 3x2−5xy−6y2

tankabanditka [31]

Answer:

Solution to the given expression is $(x^2 -10y^2 -2xy)$

Step-by-step explanation:

Here, the given expression are:

$P(x) = 2x^2- 3xy+4y^2\\Q(x) = 3x^2 - 5xy-6y^2$

To Solve for : Q(x) - P(x)

Now substitute the value of P(x) and Q(x) , we get:

$Q(x) - P(x) = P(x) = (3x^2 - 5xy-6y^2) - (2x^2- 3xy+4y^2)\\= 3x^2 - 5xy-6y^2 - 2x^2+3xy-4y^2\\=x^2-10y^2-2xy\\\implies Q(x) - P(x) = (x^2-10y^2-2xy)$

Hence solution to the given expression is $(x^2 -10y^2 -2xy)$

8 0

4 years ago

What is 4⁹+ 4⁷ =<br> I need help I can’t figure this out

rewona [7]

Answer:

278528

Step-by-step explanation:

1st we need to get the 1st 2 values of exponets

4 to the power of 9 is 4x4 9 times and that's 262144,

4 to the power of 7 is 4x4 7 times and that's 16384

16,384 + 262,144 is 278528

3 0

3 years ago

Read 2 more answers