All categories

4 years ago

Please help! 20 points

Mathematics

1 answer:

TiliK225 [7]4 years ago

8 0

Hey Cassidy.

Our goal is to combine like-terms.

Here are our terms:
3 $\sqrt{10}$ + 7 $\sqrt{15}$ - 6 $\sqrt{10}$ - 4 $\sqrt{15}$
Let's combine like-terms.
3 $\sqrt{10}$ - 6 $\sqrt{10}$ = -3 $\sqrt{10}$
7 $\sqrt{15}$ - 4 $\sqrt{15}$ = 3 $\sqrt{15}$

We are left with:
3 $\sqrt{15}$ - 3 $\sqrt{10}$

Your answer is B.)

I hope this helps!

You might be interested in

Drag each tile to the correct box. not all tiles will be used.

lana66690 [7]

Answer:

$y=\frac{13}{6}x$ $y= \frac{11}{5}x$ $y = \frac{21}{9}x$ $y = \frac{19}{8}x$

Step-by-step explanation:

Given

The attached graph

Required

Equations with higher unit rate

First, calculate the unit rate of the graph

$m = \frac{y_2 - y_1}{x_2 - x_1}$

Where:

$(x_1.y_1) = (0,0)$

$(x_2.y_2) = (7,15)$

So:

$m = \frac{15 - 0}{7 - 0}$

$m = \frac{15}{7}$

$m = 2.143$

For the given options.

The unit rate is the coefficient of x

So: $y = \frac{19}{8}x$

Going by the above definition of unit rate.

$m = \frac{19}{8}$

$m = 2.375$

$y = \frac{27}{13}x$

$m = \frac{27}{13}$

$m = 2.077$

$y = \frac{21}{9}x$

$m = \frac{21}{9}$

$m = 2.333$

$y= \frac{11}{5}x$

$m= \frac{11}{5}$

$m= 2.20$

$y = \frac{15}{7}x$

$m = \frac{15}{7}$

$m = 2.143$

$y = \frac{31}{15}x$

$m = \frac{31}{15}$

$y = 2.067$

$y=\frac{13}{6}x$

$m=\frac{13}{6}$

$m=2.167$

The unit rates grater than the graph's from small to large are:

$y=\frac{13}{6}x$ $y= \frac{11}{5}x$ $y = \frac{21}{9}x$ $y = \frac{19}{8}x$

$m=\frac{13}{6}$ $m= \frac{11}{5}$ $m = \frac{21}{9}$ $m = \frac{19}{8}$

4 0

3 years ago

Read 2 more answers

5. Monday night it was -2.3°C. If the

ozzi

Answer:

-4.6

Step-by-step explanation:

-2.3-2.3=-4.6

8 0

2 years ago

Put these fractions in order of size, smallest to largest.<br> 7/10<br> 2/3<br> 4/5<br> 11/15

Alla [95]

Answer:

11/15 7/10 4/5 2/3

Step-by-step explanation:

the bigger the fraction the smaller the number

4 0

3 years ago

A rectangle sandbox has a width of 5 feet. Tbe sandbox is 5 times as long as it is wide. What is the perimeter of the sandbox?

NikAS [45]

The perimeter of the sandbox is 60 ft.
5x5=25
Two sides = 25, so 25+25 = 50.
Two other sides = 5, so 5+5=10
50+10 = 60, and that is the correct answer.
If you would like any more assistance with this type of questions, let me know and I will be able to further assist you. Thank you!

6 0

4 years ago

19. The areas of corresponding faces of two similar hexagonal prisms are 25 cm² and 121 cm². What is the ratios of the correspon

Pie

ANSWER

I) 5:11

ii) 5:11

iii) 125:1331

EXPLANATION

Let the side lengths be in the ratio:

x:y

This implies that the area will be in the ratio:

$\frac{ {x}^{2} }{ {y}^{2} } = \frac{25}{121}$

Take positive square root.

$\frac{x}{y} = \sqrt{ \frac{25}{121} }$

$\frac{x}{y} = \frac{5}{11}$

Hence the sides are in the ratio:

x:y=5:11

The perimeter of the smaller hexagon is 6×5=30

The perimeter of the larger hexagon is 6×11=66

The ratio of the perimeter is

30:66=5:11

The volume will be in the ratio

5³:11³

125:1331

6 0

3 years ago