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vitfil [10]
3 years ago
10

What is 40t^2 - 400t + 500 = 0 factored

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
6 0
= 40(t^2 - 10t + 12.5)  answer
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Please help! Calculate the average rate of change for the given function, from x = 1 to x = 4.
egoroff_w [7]

Answer:

  4)  2

Step-by-step explanation:

The average rate of change is ...

  (f(4) -f(1))/(4 -1) = (10 -4)/3 = 6/3 = 2

5 0
3 years ago
Please Help Me With This Math Problem
gizmo_the_mogwai [7]

Answer:

Yes the relationship is linear and given by:

y+2=-\frac{5}{4} \,(x+9) (first option of your list)

Step-by-step explanation:

Yes, it is a linear expression. As we did in previous exercises, we calculate the difference between consecutive y values of the table, and write down the answers we get:

-7-(-2) = -7+2 = -5

-12-(-7) = -12 +7 = -5

-17 - (-12) = -17 + 12 = -5

We notice that all of them give "-5"

Now we evaluate the difference between consecutive x-values in a similar fashion:

-5 -(-9) = -5+9 = 4

-1-(-5) = -1+5 = 4

3-(-1) = 3+1 = 4

We see that they all give 4 as the difference.

That means that the rate of change \frac{y_2-y_1}{x_2-x_1} =\frac{y_3-y_2}{x_3-x_2}=\frac{y_4-y_3}{x_4-x_3}=\frac{-5}{4}

This means that the slope (rate of change) of the line is "-5/4"

We can now use the general point-slope form to write the equation of the line, using the first pair of the table as our selected point, and using "-5/4" for the slope:

y-y_0=m\,(x-x_0)\\y-(-2)=-\frac{5}{4} \,(x-(-9))\\y+2=-\frac{5}{4} \,(x+9)

which is the first expression listed among your possible answer choices.

4 0
3 years ago
Can someone help me plz??
Brrunno [24]

Answer: 23

Step-by-step explanation:

2x + 14 = 60

2x = 46

x = 23

6 0
2 years ago
At one particular store, the sale price, s, is always 75% of the display price, d
sattari [20]

Answer:

0.75d

Step-by-step explanation:

<u>Step 1:  Convert words into an expression</u>

At one particular store, the sale price, s, is always 75% of the display price, d

d is the display price

%75 they are always off

d*%75

d * 0.75

<em>0.75d</em>

<em />

Answer:  0.75d

5 0
3 years ago
Evaluate the expression when x=-2 y=3 and z = -1/5<br> xyz=
lakkis [162]

Answer:

33

Step-by-step explanation:

6 0
3 years ago
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