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
Vika [28.1K]
3 years ago
11

Alana was working out on the treadmill. she worked out for 15 minutes. part of the time she was walking at 3.1 miles per hour. t

he rest of the time she was jogging at 5.2 miles per hour. during the 15 minutes, she covered exactly 1.09 mile. how much time did she spend walking, and how much time jogging
Mathematics
1 answer:
guapka [62]3 years ago
3 0
Time taken for work out was 1/4 hours
let the time taken to walk be x
time spent for jogging will be (1/4-x)

distance=speed×time

distance walked will be:
3.1x miles

distance jogged will be:
5.2(1/4-x) miles

Total distance:
3.1x+5.2(1/4-x)=1.09

solving for x we get
3.1x-5.2x+1.3=1.09
2.1x=0.21
x=0.1
Thus time spent on waling was o.1 hours
time spent on jogging was 0.25-0.1=0.15 hours

You might be interested in
26. A book costs sh. (x - 300) and a pen costs sh (x + 100). If Ndagire pad sh. 3300 for 3 books and 2 pens, how much did she pa
saul85 [17]

Answer:

500 and 900

Step-by-step explanation:

3(x - 300) + 2(x + 100) = 3300 ← distribute parenthesis

3x - 900 + 2x + 200 = 3300

5x - 700 = 3300 ( add 700 to both sides )

5x = 4000 ( divide both sides by 5 )

x = 800

Then

cost of book = x - 300 = 800 - 300 = 500

cost of pen = x + 100 = 800 + 100 = 900

7 0
1 year ago
Write each product using an exponent.<br><br> 9 × 9 × 9 × 9
ki77a [65]

Answer:

9^4 is what you’re looking for right?

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
The tea chest needs to send the sales tax that it has collected to the state. The total sales, including 4% sales tax are $7115.
Elina [12.6K]
.04*7115.68=284.6272

$284.62 or $284.63 (depending on how lenient your teacher is with rounding)
8 0
3 years ago
Verify the identity and explain how cot(x- pi/2)= -tan x
pav-90 [236]

Answer:

First, let's recall some usefull information:

- cot(x) = 1/tg(x) = cos(x)/sin(x)

- tan(x) = sin(x)/cos(x)

We also know that:

- cos(x - pi/2) = sin(x)

- sin(x - pi/2) = -cos(x)

Now we can use those relationships and get:

cot(x - pi/2) = cos(x - pi/2)/sin(x -pi/2) = sin(x)/-cos(x) = -tan(x)

So we have verified the identity, and explained step by step why the identity is true.

8 0
3 years ago
Determine the intercepts of the line. Do not round your answers. 2x+5y=-6, y x-intercept:
NikAS [45]

The required x and y-intercept of the given line is -3 and -6/5 respectively.  

<h3>What is the slope of the line?</h3>

The slope of the line is the tangent angle made by line with horizontal. i.e. m =tanx where x in degrees.

Here,
The given equation of the line is 2x+5y=-6.
Transform into standard form of line .i.e  is y = mx + c

5y = -2x - 6
y = -2x/5 - 6/5
here , m = -2/5 and c = -6/5
Since c = y-intercept of the line = -6/5
Now, put y = 0 in the equation of the line.
2x = -6
x = -3

Thus, the required x and y-intercept of the given line is -3 and -6/5 respectively.  

Learn more about slopes here:
brainly.com/question/3605446

#SPJ1

3 0
1 year ago
Other questions:
  • miles wants some new games for his phone. each game costs 2.99 how much would it cost if he bought 7 new games
    9·2 answers
  • An ostrich that is 108 inches tall is 20 inches taller than 4 times the height of a kiwi. What is the height of the kiwi in inch
    6·1 answer
  • I Need this ASAP .Triangle PQR is transformed to similar triangle P'Q'R'.What is the scale factor of dilation?
    12·2 answers
  • Very confused on how to do this and I’m only using the circled function so if anyone can help me that would be very helpful :)
    7·1 answer
  • Which expression is equivalent to n + n - 0.18n
    8·2 answers
  • HAVE TO EVALUATE SHOW WORK !!!!!<br><br> 2ny + x
    11·1 answer
  • Mr. Wilson drives 450 miles in seven hours. At this rate, about how many miles does he drive in six hours? A) 101 B) 254 C) 340
    11·1 answer
  • Need some help on this question
    8·1 answer
  • PLSSS HELP IF YOU TURLY KNOW
    15·2 answers
  • X-2&lt;3 I can’t do this I have adhd so it is really hard for me
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!