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ankoles [38]
4 years ago
7

Simplify this expression HELP ASAP

Mathematics
1 answer:
Sergio039 [100]4 years ago
8 0

Answer:

B

Step-by-step explanation:

Noting the following rule of radicals

\sqrt{a} × \sqrt{b} = \sqrt{ab}

Given

(\sqrt{2} + \sqrt{3})( \sqrt{5} - \sqrt{7} )

Each term in the second factor is multiplied by each term in the first factor

= \sqrt{2}(\sqrt{5} - \sqrt{7}) + \sqrt{3}(\sqrt{5} - \sqrt{7}) ← distribute parenthesis

= \sqrt{10} - \sqrt{14} + \sqrt{15} - \sqrt{21}

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What is the slope of the line that passes through the points (-4,9) and (-8,3)? Group of answer choices 3/2 -2/3 -1/2
nataly862011 [7]

Answer:

3/2

Step-by-step explanation:

3-9/-8-(-4). -6/-4. turn into positive due to the two negatives and becomes 3/2

8 0
3 years ago
A store sells a package of 25 trading hearts for $5.25 use pencil and paper explain how you can tell that the unit price per car
creativ13 [48]

Answer:

Unitary cost per card= $0.21

Step-by-step explanation:

Giving the following information:

Number of cards per packecge= 25

Total cost per package= $5.25

<u>To calculate the unitary cost of each card, we need to use the following formula:</u>

Unitary cost per card= total cost / number of cards per package

Unitary cost per card= 5.25 / 25

Unitary cost per card= $0.21

3 0
3 years ago
Write the equation of the line that passes<br> through the points (3, 1) and (-2, 6).
tia_tia [17]

Answer:

Equation is Y=mx+c (that's how I know it, it may differ)

Step-by-step explanation:

First get the slope which is M and you just gotta do the second y - the first y from the brackets and divide them by the second x - the first x

6-1 /-2-3 = 5/-5

= -1

So now u gotta find c, C= Y-mx

And u have got two brackets, which have an x and y, and u now have m.

Pick one of the brackets like (-2,6) and put them in the equation so it will be : C =6+1*-2

So C =4

The equation now is : Y = - 1x + 4

5 0
2 years ago
Gauthmath homework code - ER326P
frozen [14]

Answer:

wat

Step-by-step explanation:

4 0
3 years ago
Find the equation of the line with slope 2 that passes through the point (4,-8)
sesenic [268]

Step-by-step explanation:

Given point (4 , -8) , slope (m) = 2

Now

the equation of line is

y - y1 = m ( x - x1)

y +8 = 2 ( x -4)

y + 8 = 2x - 8

2x - 8 - 8 -y = 0

2x - y - 16 = 0

which is the required equation

3 0
3 years ago
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