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Inessa [10]
3 years ago
9

Simplify this expression. (√2 + √3)(√5 - √7)

Mathematics
2 answers:
Fynjy0 [20]3 years ago
7 0

Answer:

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

OPTION B

Stels [109]3 years ago
4 0
\sqrt{10}-\sqrt{14}+\sqrt{15}-\sqrt{21}
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(02.07)Which relationship is always true for the angles x, y, and z of triangle ABC? A triangle is shown with a leg extending pa
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Check out the attached image. I drew what I think your book is showing. The figure on the left is triangle ABC without any extended segments. The figure on the right has segment AB extended shown in red. This forms the exterior angle x

The rule that connects x, y and z together is the remote interior angle theorem. It says that adding two interior angles is going to be equal to the exterior angle that is not touching either interior angle. The "remote" part means "far away" so just think of the two angles that are furthest way or not touching the exterior angle in question. 

In terms of algebra, the rule is
x+y = z

3 0
3 years ago
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solve |5x - 1| < 1 a. {x|0 < x < 2/5} b. {x|x < 0 or x > 2/5} c. {x|-2/5 < x < 2/5}
aliina [53]
<span>|5x - 1| < 1
-1 < 5x - 1 < 1
-1 + 1 < 5x < 1 + 1
0 < 5x < 2
0/5 < x < 2/5
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8 0
2 years ago
Adrian spends $238 on a DVD. If he buys 18 DVD,s approximately how much money will he spend in all?​
bija089 [108]

Answer:

Adrian would spend exactly $4,284.

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3 years ago
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Help plzzzz! pre calc question
Mumz [18]

Answer:

\sum^{\infty}_0 {(-3)^n}

Step-by-step explanation:

Notice that the series: 1 - 3 + 9 - 27 +... clearly has powers of the factor 3 in its terms and it is also an alternate series (the terms alternate from positive to negative). The terms are positive for a_0, a_2, a_4, ... (even terms) , while the odd terms a_1, a_3, a_5, ... are negative. (so most likely there should be a factor   (-1) in the common ratio.

We can then represent it with the following summation expression:

\sum^{\infty}_0 {(-3)^n} given that each of its first four terms are:

a_0=(-3)^0=1\\a_1=(-3)^1=-3\\a_2=(-3)^2=(-3)*(-3)=9\\a_3=(-3)^3=(-3)*(-3)*(-3)=-27

7 0
3 years ago
Divide 71/9 2/34 <br><br>A. 21/4 <br>B. 23/4<br>C. 41/4<br>D. 413/16<br><br><br>HELLPPPPPP ​
ozzi

Answer:

A 5.25, B 5.75, C 10.25, D 25.8125

Step-by-step explanation:

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