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Paha777 [63]
3 years ago
8

A lighthouse casts a 128-ft shadow. A nearby lamppost that measures 5

Mathematics
1 answer:
Yakvenalex [24]3 years ago
5 0

Answer:

80 ft

Step-by-step explanation:

Let the height of the light house be x feet.

\therefore \:  \frac{128}{8}  =  \frac{x}{5}  \\  \\ x =  \frac{128 \times 5}{8}  \\  \\ x =  \frac{640}{8}  \\  \\ x = 80 \: feet

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When subtracting polynomials,distribute the negative sign,then add.
Doss [256]

Answer:

7m^2 - 11m - 2

Step-by-step explanation:

Subtract (-3m^2 + 10m + 4) from 4m^2 - m + 2:

  4m^2 - m + 2

- (-3m^2 + 10m + 4)   Now distribute the negative sign:

  4m^2 - m + 2

+ 3m^2 - 10m - 4

--------------------------

   7m^2 - 11m - 2 is the final answer.

5 0
3 years ago
What is the answer please show work 7x + 4 = 5x + 10
RSB [31]

Answer:

x=3

Step-by-step explanation:

subtract 5x from 7x

subtract 4 from 10

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7 0
3 years ago
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For the problem -4(-5)(9), will the answer be positive or negative?
Scorpion4ik [409]

Answer:

Positive

Step-by-step explanation:

-4(-5)(9)

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20(9)

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8 0
3 years ago
I don't know how to do this one. plz help
egoroff_w [7]

Answer:

As x decreases without bound, f(x) increases without bound

As x increases without bound, f(x) approaches 0

Step-by-step explanation:

As x gets more and more negative f(x)  gets bigger and bigger

f(x) = (7/10) ^ x but x is negative  so flip it and then x is a larger number

       (10/7) ^  large number   so it will get larger

 as → -∞   f(x) →∞    


As x gets more and more positive f(x)  gets smaller and smaller

f(x) = (7/10) ^ x   closer and closer to 0.  The denominator gets larger faster than the numerator  = 1 / large number

       

 as → ∞   f(x) →0    

3 0
3 years ago
At a team meeting, 80% of the tennis team was there. If there were 12
Illusion [34]

Answer:

15 people

Step-by-step explanation:

let x=total # of people on the team

80%=12

80/100=12/x

cross multiply

80x=1200

division property of equality (divide both sides by 80)

x=15

There are 15 people on the team.

8 0
3 years ago
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