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3 years ago

5(x + 3) = 30 Write steps and solve

Mathematics

2 answers:

Lerok [7]3 years ago

8 0

Answer:

5x+15=30

Step-by-step explanation:

You would do distributive property so you would do 5(x)+ 5(3) and it equals 30. subtract 15 from both sides and it equal 5x=15, then it would be x=3

weqwewe [10]3 years ago

4 0

Answer:

Step-by-step explanation:

so u would distribute the 5 so it would be 5x + 15 = 30. Then u would subtract 15 to 30 which is 15. So 5x = 15. Then divide 15 by 5 so x = 3

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3 years ago

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Multiplying 10 by what number will produce an irrational number?

dedylja [7]

Answer:

Multiplying 10 by pi will produce an irrational number.

Step-by-step explanation:

10 and 10 are both rational, 10 and 10.5 are both rational, 10 and √4 are both rational (I researched to double check), leaving 10 rational and 3π irrational, meaning that the answer is B 3π.

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2 years ago

A book club charges an initial joining fee of $18.00. The cost per book is $10.25. The graph shows the cost of belonging to the

Alex73 [517]

The question doesn't show any graph, but I have included it to help you with the problem.

Answer:

The new graph will be shifted up by 3 units

Step-by-step explanation:

Graph of a Real Function

The total cost of belonging to the book club depends on one fixed cost, the initial joining fee, and a variable cost, depending on the number of books purchased. Call C the total cost and x the number of purchased books, then

$C=18+10.25x$

By giving x some values, we get the corresponding values of C and then we can plot the graph as a blue line, in the image provided below.

If the joining fee goes up by $3, the new function is

$C'=18+10.25x+3$

$C'=21+10.25x$

The graph is also shown in the image, but with a red line. We can see the graph is shifted up by 3 units in the y-axis, but the slope remains the same, as the cost per book hasn't changed

7 0

3 years ago

Find the size of an angle which is five times its supplement

zavuch27 [327]

Two supplementary angles when addd together equal 180.

let one angle = x

The second angle is 5 times that so would be 5x

x + 5x = 180

Simplify:

6x = 180

Divide both sides by 6:

X = 30

One angle is 30, the second angle would be 150

The answer is 150

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2 years ago

A bicycle was originally sold for $400 was on sale for $320. what percent was the bike marked down?

Eva8 [605]

100% of the price = $400
x % of the price = $320
we need to find x

using a proportion
100 : 400 = x : 320
100 * 320 = 400 * x
32000 = 400x
x = 32000 / 400
x = 80

That means the new price is 80% of the previous price.
100% - 80% = 20%
and based on this we can make a conclusion that the discount was 20%

I hope it is clear to you, feel free to ask anything about it :)

6 0

3 years ago

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