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
Serhud [2]
3 years ago
7

Francesca plans to compete in a biathlon that involves running and cycling. During one training​ session, she covered a total di

stance of 46 miles in four hours. If she ran at a rate of 5 mph and cycled at a rate of 15 ​mph, how long did she spend​ cycling?
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
4 0

Answer:

.

Step-by-step explanation:

Use the distance formula

d = vt

where:

d = distance (miles)

v = speed (mph)

t = time (hours)

Let  x = run time

Let  y = bike time

Total time:      x + y = 4

Using these variables we can write an equation representing the formula.

dTotal = drun + dbike

49 = 9x + 22y

Next, we get the equation in terms of only x or y.  We'll get it in terms of x.

49 = 9x +22(4 - x)

49 = 9x + 88 - 22x

-39 = -13x

 3 = x

Plug in this value of x into the variables to find the distance for each part.

run distance = 9x

bike distance = 22(4 - x)

You might be interested in
The mean salary of actuaries is LaTeX: \mu=\$100,000????=$100,000 and the standard deviation is LaTeX: \sigma=\$36,730????=$36,7
krek1111 [17]

Answer:

The lower limit of 95% confidence interval is 99002.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $100,000

Sample mean, \bar{x} = $111,000

Sample size, n = 36

Alpha, α = 0.05

Population standard deviation, σ = $36,730

First, we design the null and the alternate hypothesis

H_{0}: \mu = \$100,000\\H_A: \mu \neq \$100,000

We have to find the lower limit of the 95% confidence interval.

95% Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

111000 \pm 1.96(\dfrac{36730}{\sqrt{36}} )\\\\ = 111000 \pm 11998.4667 \\= (99001.5333,122998.4667)\\ \approx (99002,122999)

The lower limit of 95% confidence interval is 99002.

6 0
4 years ago
Question 14 of 15
Stells [14]

Answer:

Wind

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
Type SSS, SAS, ASA, AAS, or HL to justify why AABC = ADEF.<br><br> AC FD and AB = DE
bezimeni [28]

The theorem that justifies why triangles ABC and DEF are congruent is: HL.

<h3>What is the Hypotenuse-Leg Congruence Theorem (HL)?</h3>

The hypotenuse-leg congruence theorem (HL) states that if two triangles that are right triangles have a pair of congruent hypotenuse and a pair of corresponding congruent legs, then both right triangles are proven to be congruent to each other. This means both right triangles are have the same shape and size.

Given that:

angle ABC = angle DEF = 90° (congruent right angles, this means both triangles are right triangles)

AC = FD (a pair of congruent hypotenuse)

AB = DE (a pair of congruent legs)

Thus, we can conclude that since triangle ABC and triangle DEF have a pair of congruent hypotenuses and a pair of congruent legs, therefore, the two right triangles, triangle ABC and triangle DEF are congruent to each other by the HL congruent theorem.

Thus, the theorem that justifies why both triangles are congruent is: HL.

Learn more about the HL congruence theorem on:

brainly.com/question/2102943

#SPJ1

3 0
1 year ago
Read 2 more answers
Fran is going to transfer her credit card balance over to a new card. She has an existing balance of $752.69. Her current card c
Elina [12.6K]

Answer:

Fran's balance will be $866.73.

Step-by-step explanation:

She has an existing balance of $752.69

Her current card charges her a transfer fee of 12.5%, added to her balance, for transferring her debt.

This becomes: 0.125\times752.69=94.08

Total is : 752.69+94.08=846.77

The new card has an opening fee of $50, which is also added to her balance.

This becomes now = 846.77+50=896.77

She will also have to make an immediate minimum payment, which is 3.35% of her total balance.

This amount is = 0.0335\times896.77=30.04

Now balance in her account is = 896.77-30.04=866.73

So, Fran's balance will be $866.73.

5 0
4 years ago
Seven ping-pong balls numbered 1-7 are put in a hat. Three balls are chosen without replacement. What is the probability that al
muminat
Probability of 1st number being even : 3/7
probability of 2nd number being even : 2/6
probability of 3rd number being even : 1/5

probability of all 3 numbers being even : 3/7 * 2/6 * 1/5 = 6/210 = 1/35
5 0
3 years ago
Read 2 more answers
Other questions:
  • The perimeter of a rectangular field is 340 yd. The length is 30 yd longer than the width. Find the dimensions.
    15·1 answer
  • Plz answer this ASAP! What is the x-coordinate of the solution for the system of equations? {y−x=910+2x=−2y Enter your answer in
    15·1 answer
  • A shirt is on sale for 15% off the original price of 27$. what is the sale price of the shirt
    6·1 answer
  • The sets
    13·1 answer
  • Guidance counselors in a school would like to determine whether studying Latin helps students achieve higher scores on the verba
    8·1 answer
  • Make up a rhyme (15 words or more) using the words "Function", "Binomial", and "Polynomial".​
    9·2 answers
  • Find the volume of this figure to the nearest whole number. Use 3.14 for a pie .
    10·1 answer
  • Find the cube root of 512​
    10·1 answer
  • A storage bin has the shape of a cylinder with a conical top. What is the volume of the storage bin if its radius is
    8·1 answer
  • (1/2)^3-(1/4)^2+1/2 help?​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!