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
lbvjy [14]
3 years ago
12

If Roberto does a job in 11 hours and with the help of Sarah they can do it together in 2 hours, how long would it take Sarah to

do it alone?
Mathematics
1 answer:
Levart [38]3 years ago
3 0
I think it is seven but im probaly wrong
You might be interested in
If you pay $43 for a set of Pokémon cards online that were listed for $40 what is the tax percent you were charged
Alex777 [14]

Amount of tax paid = 43-40 = 3

Tax rate = 3/40 = 0.75

0.75 x 100 = 7.5%

Tax rate = 7.5%

3 0
3 years ago
Find the x-intercepts of the parabola with vertex (1,-108) and y-intercept (0,-105). Write your answer in this form: (X1,y1), (x
Stolb23 [73]

Answer:

(7, 0) and (-5, 0)

Step-by-step explanation:

<u>Vertex form</u>

y=a(x-h)^2+k  

(where (h, k) is the vertex)

Given:

  • vertex = (1, -108)

\implies y=a(x-1)^2-108

Given:

  • y-intercept = (0, -105)

\implies a(0-1)^2-108=-105

\implies a(-1)^2=-105+108

\implies a=3

Therefore:

\implies y=3(x-1)^2-108

The x-intercepts are when y = 0

\implies 3(x-1)^2-108=0

\implies 3(x-1)^2=108

\implies (x-1)^2=36

\implies x-1=\pm \sqrt{36}

\implies x=1\pm 6

\implies x=7, x=-5

Therefore, the x-intercepts are (7, 0) and (-5, 0)

7 0
2 years ago
15% of people on the beach do not wear sun screen. If 30 people don't wear sunscreen, what is the total number of people at the
lara [203]

Answer: The information you are given shows that 15% = 30. Multiply 30 by 6 and 2/3 (The number of times 15 goes into 100) and you have your answer. There are 200 people on the beach.

6 0
3 years ago
Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature is 45 degrees at midnig
Paraphin [41]

Answer:

D = 9sin(2π(t + a)/24) + 45

Step-by-step explanation:

Let's find the average temperature;

(54 + 36)/2 = 45°

Amplitude = 54 - 45 = 9

From the wave equation, we can write the temperature as;

D = 9sin(2π(t + a)/24) + 45

Where;

D is the temperature

t is the time in hours after midnight

a is a "phase" that is used to set the time at which temperature(D) occurs

5 0
3 years ago
Answer this pls fast ASAP
Katarina [22]

Answer:

14.13 units^2.

Step-by-step explanation:

The area of a circle is found by doing pi * r^2. In this case, the diameter is 6. 6 / 2 = 3. So, r = 3.

pi * 3^2 = pi * 9 = 9pi.

This is a semicircle, so the area will be half of the whole circle.

9pi / 2 = 4.5 * pi = 4.5 * 3.14 = 14.13 units^2.

Hope this helps!

4 0
3 years ago
Read 2 more answers
Other questions:
  • Help me i hate word problems
    5·1 answer
  • HURRY! Match each function with the correct inverse of the function. BEST &amp; FASTEST ANSWER GETS BRAINIEST ANSWER!!!!!!!!!
    11·1 answer
  • Which sets of side lengths could form a triangle? Choose all that apply.
    7·1 answer
  • a coin is tossed 4 times which of the following represents the probability of the coin landing on heads all 4 times
    7·1 answer
  • F(-4,5), G(3,3), H(6,-4) and I(-1,-2).
    8·1 answer
  • Calculate the area of the rectangle with a base of 15 inches and and an altitude of 7 inches
    14·1 answer
  • The graph below shows the height an elevator travels, y, in x seconds:
    15·1 answer
  • Yesterday, between noon and midnight, the temperature dropped by 25.8°F. If the
    14·1 answer
  • if anyone is good at pre-calc i will literally pay you $5 in apple cash to do a 2 page assignment plz if you're interested add m
    7·1 answer
  • What is the output for the equation: y = -3x - 7?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!