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
dolphi86 [110]
3 years ago
7

If Fran were to paint her living room alone, it would take 6 hours. Her sister Denise

Mathematics
1 answer:
natita [175]3 years ago
3 0

Answer:

r1 =6

r2 =8

t = ?

[(1/r1) * t] + [(1/r2)*t] = 1

t/6 + t/8 = 1

multiply by common denominator... 24

24 (t/6 + t/8 = 1)

4t + 3t =24

7t = 24

t = 24/7 = 3.4hrs

You might be interested in
A pan has an original price of$32​
Arte-miy333 [17]

Answer:

OK good sir how do I PURRRRRRR chase

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Let f(x) = 4x2 + 8x + 7 and g(x) = 3x + 2. Determine the rule for the composite functions f ∘ g and g ∘ f.
Nataliya [291]

Answer:

(g ° f)(x) = 12x² + 24x + 23

(f ° g)(x) = 36x² + 72x + 49

Step-by-step explanation:

Here we go. Firstly you have to rewrite f ° g into f(g(x)), that should make it clearer. We, then substitute every x in f by g(x). So:

f(g(x)) = 4(g(x))² + 8(g(x)) + 7

= 4(3x+2)²+8(3x+2)+7

= 4(9x²+12x+4) + 24x + 16 + 17

= 36x² + 48x + 16 + 24x + 16 + 17

finally.. you need to regroup like that:

f ° g(x) = 36x² + 72x + 49

The same thing for g ° f(x)

but this time you substitute by f(x) in g(x) instead.

6 0
3 years ago
Simplify the following expression.<br> X^-2/3 multiplied by x^6/7
lilavasa [31]
The answer should x^4 divide by 21

7 0
3 years ago
Write the formula to find the profit %, if selling price and cost price both are given.
jolli1 [7]

Answer:

profit \: percent =  \frac{sp - cp}{cp}  \times 100 \: percent

where,

SP=Selling price

CP=Cost price

<h3>For example:</h3>

Given,

Selling price(SP)= 1000

Cost price(CP)=800

Now,

profit \: percent =  \frac{sp - cp}{cp}  \times 100 \: percent \\  =  \frac{1000 - 800}{800}  \times 100 \\  =  \frac{200}{800}  \times 100 \\  = 25 \: percent

Hope this helps...

Good luck on your assignment..

5 0
3 years ago
The area of a circle of radius 10 units is equal to the surface area of a sph<br> of radius 5 units.
Naya [18.7K]

Answer:

it is 15

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Which statements describe the sequence –3, 5, –7, 9, –11, …? Check all that apply. The sequence has 5 terms. The 4th term of the
    15·3 answers
  • Raj builds a side table in the shape of a cube. Each edge of the cube measures 30 inches. Raj wants to cover the top and four si
    15·1 answer
  • A local BBQ restaurants offers 2 side dishes with a lunch plate. There are 7 side dishes. How many choices of side dishes does a
    13·1 answer
  • Pls help show work step by step
    10·1 answer
  • Please help! Thank you! Also, please explain thank you!
    14·1 answer
  • A fair coin is tossed 3 times in a row. What is the probability that heads appears exactly 2 times?
    5·1 answer
  • 21-7y+3x-xy solve by factoring by grouping
    11·1 answer
  • What Fraction of<br> 72 is 96?
    9·1 answer
  • Solve each equation 12x - 51 = 3(x + 7)
    10·1 answer
  • Company A charges a one-time fee of $60, and $25 per hour. Company B charges a one-time fee of $120, and $20 per hour.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!