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Free_Kalibri [48]
3 years ago
9

Is this work correct?

Mathematics
1 answer:
Zina [86]3 years ago
5 0
Yes, the work is correct.
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Find the unit rate. 21 3/4 meters in 2 1/2 hours
anyanavicka [17]
(21 3/4) / (2 1/2) =
(87/4) / (5/2) =
87/4 * 2/5 =
174/20 reduces to 8 7/10 (or 8.7)meters per hr
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4 years ago
Let f(x) = -4x - 2 and g(x) = 5x - 6. Find fxg and state its domain.
defon

Answer:

c) -20x^2+14x+12

all real numbers

Step-by-step explanation:

So (fg)(x)=f(x)g(x)=(-4x-2)(5x-6).

Need find the expression in standard form we need to use foil:

First:  (-4x)(5x)=-20x^2

Outer: (-4x)(-6)=24x

Inner:  (-2)(5x)=-10x

Last:  (-2)(-6)=12

--------------------------Add like terms:

-20x^2+14x+12

Polynomials have domain all real numbers.

There are no restrictions on what x can be.  For every number you plug in, you will get a number back.  

8 0
3 years ago
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Althea paid $5.00 each for two bracelets and later sold each for $15.00. She paid $8.00 each for three bracelets
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Answer:

I have the same question

Step-by-step explanation:

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8 0
3 years ago
Find the area of the figure.
Hoochie [10]

Answer:

384 cm

Step-by-step explanation:

7.5 x 24 = 180

8.5 + 7.5 = 16

16 x 24 = 384

5 0
3 years ago
2(5-8x-9x)+4(7x+7)=14
xenn [34]

Step-by-step explanation:

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