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solmaris [256]
3 years ago
12

the company found that an experienced surveyor can survey a roadbed in 5 hours. An apprentice needs 8 hours to survey the same s

tretch of road. If the two work together, find how long it takes them to complete the job.
Mathematics
1 answer:
dedylja [7]3 years ago
7 0
40 hours is the answer
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How do I solve this question
nika2105 [10]

Answer:

D

Step-by-step explanation:

Sum = -12

Product = -48

Factors = -12 , 4

-12 + 4 = - 8  & -12 * 4 = -48

x² - 8x - 48 = x² - 12x + 4x  - 4*12

                  = x(x - 12) + 4(x - 12)

                 = (x - 12) (x + 4)

5 0
2 years ago
A clay block is 12 cm long 6cm wide and 2cm high and the density is 1.25cm3 what is the mass
Ksenya-84 [330]

Answer:

180

Step-by-step explanation:

formula density:

p =  \frac{m}{v}

find volume ..

v = 12 \times 6 \times 2  \\  = 144

subtitute into formula density..

1.25 =  \frac{m}{144}

m = 180

6 0
2 years ago
Find the length of the third side. If necessary, round to the nearest tenth.914
Zina [86]

The given trinagle is a right angle triangle. let the missing side be x. To find x, we would apply the pythagorean theorem which is expressed as

hypotenuse^2 = one leg^2 + other leg^2

From the triangle,

hypotenuse = 14

one leg = 9

other leg = x

Thus, we have

\begin{gathered} 14^2=9^2+x^2 \\ 196=81+x^2 \\ x^2\text{ = 196 - 81 = 115} \\ x\text{ = }\sqrt[]{115} \\ x\text{ = 10.72} \end{gathered}

To the nearest tenth, the length of the third side is 10.7

4 0
1 year ago
Y varies directly as xy equals 5 when X is 8 how do you find y when X is 9
FrozenT [24]

Given, y varies directly as x

So,

y=c\cdot x

Where c is a constant

When y equals 5 when x is 8

So,

\begin{gathered} 5=c\cdot8 \\ c=\frac{5}{8} \\  \end{gathered}

So, the relation between y and x

y=\frac{5}{8}x

now , when x = 9

Substitute with x to find y

y=\frac{5}{8}\cdot9=\frac{45}{8}

So, the answer is option 2. y = 45/8

5 0
1 year ago
Help me please......................
OverLord2011 [107]
60 is 15
30 is 6
75 is 12
35 is 7
That’s the answer
3 0
2 years ago
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