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maksim [4K]
3 years ago
12

Which of the expressions below are equivalent? 8x - 4 4x 4(2x - 1)

Mathematics
1 answer:
alexandr402 [8]3 years ago
4 0
8x-4 and 4(2x-1)




4(2x-1) the four needs to be distributed in the parentheses.

4*2x=8x
4*(-1)=(-4)

8x-4=8x-4
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In 2005 there were 78250 car accidents in 60187 of them the driver was under the age of 30 based on this what is the probability
BabaBlast [244]

Answer:

77% to the nearest whole number

Step-by-step explanation:

This is  60187 / 78250

= 0.7691

= 77%

4 0
3 years ago
Read 2 more answers
If a 45º-45º-90º triangle has a hypotenuse of length 9, find the leg length.
iVinArrow [24]

Answer:

Step-by-step explanation:

x²+x²=9²

2x²=81

x²=81/2=(81×2)/4

x=9√2/2≈4.5√2≈6.36

9.

x²+x²=11²

2x²=11²

x²=11²/2

x=11/√2=11√2/2≈7.78

7 0
3 years ago
Find the average rate of change between f(-7) and f(-1) in the function f(x)=x^2+2x -8
Levart [38]

Answer:

- 6

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

\frac{f(b)-f(a)}{b-a}

here [ a, b ] = [ - 7, - 1 ]

f(b) = f(- 1) = (- 1)² + 2(- 1) - 8 = 1 - 2 - 8 = - 9

f(a) = f(- 7) = (- 7)² + 2(- 7) - 8 = 49 - 14 - 8 = 27

Hence

average rate of change = \frac{-9-27}{-1-(-7)} = \frac{-36}{6} = - 6

4 0
3 years ago
A baker purchases flour each week from a wholesale warehouse. The chart shows the quantities and prices available this week. If
scZoUnD [109]

The chart showing the quantities and prices is;

Best Deal 1

Quantity of Flour Price

3 pounds $5.25

5 pounds $9.75

7 pounds $12.60

10 pounds $14.20

12 pounds $18.24

Answer:

difference between last weeks best deal = $0.3

Step-by-step explanation:

Let's calculate the unit price for each of the quantities in the chart.

For quantity of 3 pounds;

We have; unit price = 5.25/3 = $1.75

For 5 pounds;. Unit price = 9.75/5 = $1.95

For 7 pounds; unit price = 12.6/7 = $1.8

For 10 pounds; unit price = 14.2/10 = $1.42

For 12 pounds; unit price = 18.24/14 = $1.3

Thus, last weeks best deal is the lowest = $1.3

Thus; difference between last weeks best deal is given as;

= this weeks best deal - last weeks best deal

This gives;

$1.6 - $1.3 = $0.3

6 0
3 years ago
Interpret the independent and dependent variables of these two bivariate data collections.
maw [93]

Answer:

The dependent variable = Number of homeruns

Independent variable = years played

The Independent variable is Number of characters per minute

Dependent variable is Texting speed

Step-by-step explanation:

The independent variable are the variables which are used to infer or being about changes to the dependent variable by supplying different values of them, they are also called predictor variables. By varying the number of years, a baseball players' number of homeruns' can be predicted in such basis, hence, the

predicted or dependent variable is the number of homeruns'.

Similarly, the Number of characters (independent) an individual is able to type within a particular period of time can be used determine the Texting speed (dependent) of such person.

5 0
3 years ago
Read 2 more answers
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