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4 years ago

I'm doing a practice test to prepare for my algebra 2 math exam and I have no idea what the answer would be here.

Mathematics

1 answer:

ZanzabumX [31]4 years ago

3 0

Answer:

It is the first one

Step-by-step explanation:

2 square root 15 x over 5x

you factor each number and then separate them

Examples to help solve the questions

$\sqrt[n]{ab}$ = $\sqrt[n]{a}$ $\sqrt[n]{b}$

$\sqrt[n]{a}$ = a^1/n
$\frac{x^a}{x^b}$ =x^a-b
a^1/n= $\sqrt[n]{a}$

also $\sqrt{15x}$ = 15^1/2

I hope this helped :)

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A jeweler had a fixed amount of gold to make bracelets and necklaces. The amount of gold in each bracelet is 7 grams and the amo

OlgaM077 [116]

Answer:

3 necklaces and 12 bracelets

Step-by-step explanation:

Bracelets = x +4

amount of necklace gold = 20*x

amount of gold in bracelet = 7*(x+4)

added together = 109 gm

20x + 7(x+4) = 109

20x + 7x+28 = 109

27x+28=109

-28 -28

27x= 81

/27 /27

x=3 necklaces

then bracelets = 3+4=12

6 0

3 years ago

Find the ratio a:b, if 2a−b/6 = b/3

Tom [10]

Answer:

a:b = 2

Step-by-step explanation:

Here we need to operate with terms in order to arrive to a ratio a:b (or a/b).

We have:

2a−b/6 = b/3

Lets sum b/6 in both sides:

2a−b/6 + b/6 = b/3 + b/6

2a = b/3 + b/6

Now, we can multiply and divide b/3 by 2 to make a 6 appear on the denominator and sum it with b/6, this is, use common denominator:

2a = b/3*(2/2) + b/6

2a = 2b/6 + b/6

2a = 3b/6

2a = b/2, as 3/6 = 1/2

Now lets divide both sides by b to make an a/b appear:

2a/b = (b/2)/b

2a/b = 1/2

Finally, multiply both sides by (1/2) or divide by 2:

(2a/b)/2 = 2

a/b = 2

This is, a is twice as b. If b is 1 so a is 2; if b is 45 so a is 90, and so on.

7 0

4 years ago

HELP PLEASE

kakasveta [241]

Number 1 is 6 number two is -8 and number three is -10

4 0

3 years ago

Read 2 more answers

The plan for the Thorne’s backyard play area, shaped like a trapezoid, is shown. The area of the play area is 286.56 square feet

lorasvet [3.4K]

The length of material needed for the border is the perimeter of the backyard play area

<h3>How to calculate the length of material needed </h3>

The area of the play area is given as:

$Area = 286.56$

The area of a trapezoid is calculated using:

$Area = 0.5 * (L1 + L2) * H$

Where L1 and L2, are the parallel sides of the trapezoid and H represents the height.

The given parameter is not enough to solve the length of material needed.

So, we make use of the following assumed values.

Assume that the parallel sides are: 25 feet and 31 feet long, respectively.

While the other sides are 10.2 feet and 8.2 feet

The length of material needed would be the sum of the above lengths.

So, we have:

$Length = 25 + 31 + 10.2 + 8.2$

$Length = 74.4$

Using the assumed values, the length of material needed for the border is 74.4 feet

I'm doing a practice test to prepare for my algebra 2 math exam and I have no idea what the answer would be here.​

I'm doing a practice test to prepare for my algebra 2 math exam and I have no idea what the answer would be here.