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4 years ago

What are the solutions of the equation 2x² = 18? Use a graph of the related function.

Mathematics

1 answer:

Dmitriy789 [7]4 years ago

3 0

Answer:

x=3

Step-by-step explanation:

2x^2= 18

divide the two by 18 —- x^2=9

now x *x= 9 or the square root of 9

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Freida earns $5.25 per hour and time-and-a-half for overtime for all hours over 40 hours. How much did she earn the week she wor

nikdorinn [45]

Answer:

Total earned= $273

Step-by-step explanation:

Giving the following information:

Regular labor hours= $5.25

Overtime labor hours= $5.25*1.5= $7.875

To calculate the total earned, we need to use the following formula:

Regular labor hours= 40*5.25= 210

Overtime labor hours= 8*7.875= 63

Total earned= 210 + 63

Total earned= $273

8 0

3 years ago

a model train has an engine and six boxcars. The engine is 12 cm long and each boxcar is 7 cm long. there is a 1 cm space betwee

dexar [7]

7 spaces total
7 × 1cm = 7cm

6 box cars
6 × 7cm = 42cm

1 engine
1 × 12cm = 12cm

7cm + 42cm + 12 cm = 61cm

The train is 61cm long.

3 0

3 years ago

Are points K, X, Q and L collinear or coplanar?

Leto [7]

Could use a diagram, but just remember collinear points all lie on a straight line, in the three dimensional world, when a set of points all lie on the same plane, they are called coplanar.

3 0

3 years ago

How to solve 9x-(4x-1)=2

koban [17]

first, we can distribute the negative into the numbers in parentheses

9x-(4x-1)=2

9x-4x+1=2

now we can combine like terms and then isolate x

5x + 1 = 2

5x = 1

x = 1/5

hope this helps

5 0

4 years ago

A house worth $70,000 when purchased was worth $67,000 after the first year and $64,000 after the second year. If the economy do

Citrus2011 [14]

Answer:

a) The formula for the sequence is

$a_n = 67,000 -3,000(n-1)$

b) $a_7 = 49,000$

Step-by-step explanation:

Note that the difference between any two consecutive terms in the sequence is always equal to $3,000

$67,000-70,000= -3,000\\\\64,000-67,000=-3,000$

Then we have an arithmetic sequence where each term increases by a magnitude of 3,000 with respect to the previous term.

The explicit formula for an arithmetic sequence is:

$a_n = a_1 +d(n-1)$

Where d is the common difference between the consecutive terms of the sequence

$d = -3,000$

$a_1$ is the first term, or the value of the house after year 1 $a_1= 67,000$

n represents the number of years since the house was purchased

With

n={0, 1, 2, 3, 4, 5, 6, 7,.., n}

a) Then the formula for the sequence is

$a_n = 67,000 -3,000(n-1)$

With

n={0, 1, 2, 3, 4, 5, 6, 7,.., n}

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

b) Now we can use the formula to find the price of the house after 7 years

$a_7 = 67,000 -3,000(7-1)$

$a_7 = 67,000 -3,000(6)$

$a_7 = 49,000$

3 0

3 years ago