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AleksAgata [21]
3 years ago
10

Question 1

Mathematics
1 answer:
KatRina [158]3 years ago
7 0

Answer:

x2+x-4=0

Step-by-step explanation:

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Jenna can clean the gutters at her house in four hours. Her older brother, John, can clean the gutters in three hours, if they w
OlgaM077 [116]

Answer:

1 hour and 42.8 minutes

Step-by-step explanation:

To answer this question let's call t_1 while it takes Jenna to clean the gutters

Let's call t_2 while it takes John to clean the gutters

t_1 = 4 h

t_2 = 3 h

t = total time

g = job = 1 (clean the gutters)

The speed of each one is:

V_1 = \frac{1}{4} g/ h

V_2 = \frac{1}{3} g/h

V = V_1 + V_2 = \frac{g}{t} = \frac{1}{t}

So:

V = V_1 + V_2 = \frac{1}{4} +\frac{1}{3}

\frac{1}{t} = \frac{1}{4} + \frac{1}{3}= \frac{7}{12} g/h

t = \frac{12}{7} h

Then, both together paint \frac{7}{12} of gutters for each hour.

This means that it takes \frac{12}{7}  hours to clean the gutters together

Finally cleaning together takes 1,714 hours or also

1 hour and 42.8 minutes

7 0
3 years ago
Growth factor for 0.008,0.8,0.8
exis [7]

https://www.tiger-algebra.com/drill/8,0.8,0.08,0.008/

3 0
2 years ago
Read 2 more answers
Someone please help me with this.
liubo4ka [24]
  • Radius=r=0.7m
  • Volume=231m^3
  • Height=h

\boxed{\sf Volume=\pi r^2h}

\\ \sf\longmapsto π(0.7)^2h=231

\\ \sf\longmapsto 0.49πh=231

\\ \sf\longmapsto πh=\dfrac{231}{0.49}

\\ \sf\longmapsto 3.14h=471.4

\\ \sf\longmapsto h=\dfrac{471.4}{3.14}

\\ \sf\longmapsto h=150m

5 0
3 years ago
Find the perimeter of the figure. Round your answer to the nearest hundredth
Nuetrik [128]

Answer:

Step-by-step explanation:

eeeeeee id tried think of 8+8+12+12=40....see if that works

7 0
4 years ago
Read 2 more answers
Mrs. Rouse has three times as many gladiolus as Mrs. Leal together they have 128 gladiolus write the system of equations for thi
natka813 [3]
R = # of Gladiolus Mrs. Rouse has
L = # of gladiolus Mrs. Leal has

R = 3L
R+L = 128

Solution for number of Gladiolus each has

3L + L = 128

4L = 128

L = 32

R = 3(32) = 96
3 0
3 years ago
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