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3 years ago

Solve for x Ps: please be ask Descriptive as possible, so I can learn how to do this Thanks!

Mathematics

1 answer:

Fantom [35]3 years ago

6 0

First you multiply both sides by 10, add 40, divide by 4, then square root

10*(4x^2-40/10)= (36)*10
(4x^2-40)+40=(360)+40
(4x^2)/4=(400)/4
x^2=100
x=10

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What is the geometric mean of 4 and 3? Your answer should be a reduced radical, NOT A DECIMAL.

Leya [2.2K]

Answer:

$2 \sqrt{3}$

Step-by-step explanation:

Geometric mean of 4 and 3

$= \sqrt{4 \times 3} \\ = \sqrt{ {2}^{2} \times 3 } \\ = 2 \sqrt{3}$

4 0

3 years ago

Alec can buy bottles of water in packages of 6 for $12.12 or in packages of 4 for $9.72. How much money does he save by buying 4

LuckyWell [14K]

48/6 = 8

He needs to buy 8 of the six pack size for a total of :

8 x 12.12 = $96.96

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4 0

3 years ago

Read 2 more answers

How do you work this problem?<br> 5 4/10 + 3 6/9

oee [108]

Answer:

136/15

Step-by-step explanation:

5 4/10+3 6/9

=54/10+33/9

=9*54+10*33/90

=486+330/90

=816/90

=136/15

3 0

3 years ago

When the new computer lab opened there were 18 computers.by the end of firdt week there were 25 computers. Find the percent of c

aliina [53]

The number of computers increased by 38.9%

Step-by-step explanation:

Number of computers at start of week = Old value = 18

Number of computers by end of week = New value = 25

Change = New value - Old value

Change = 25-18 = +7

The positive sign indicates the increase.

Increase percent = $\frac{Change}{Old\ value}*100$

$Increase\ percent=\frac{7}{18}*100\\\\Increase\ percent=\frac{700}{18}\\\\Increase\ percent= 38.88\%$

Rounding off to nearest tenth

Increase percent = 38.9%

The number of computers increased by 38.9%

Keywords: difference, percentage

Learn more about percentages at:

#LearnwithBrainly

3 0

3 years ago

To which interval would we restrict f(x) = cos (x-π/4) so that f(x) is invertible?

nadezda [96]

Answer:

The range of x values for which y is unique is 2·π

Step-by-step explanation:

For a function j: X → Y to be invertible, we have that for every y in Y, there is associated only one x which is an element of x

Hence, f(x) = cos(x - π/4) gives

the x intercept at two penultimate points of the graph of cos(x - π/4) are;

x = 2.36, and x = 8.64

x = 3/4·π, and x = 2.75·π = $2\tfrac{3}{4}\cdot \pi$

Hence the range of x values for which y is unique is presented as follows

$2\tfrac{3}{4}\cdot \pi - \frac{3}{4}\cdot \pi = 2}\cdot \pi$

The range of x values for which y is unique = 2·π.

4 0

3 years ago