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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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When Steve woke up his temperature was 102 degrees. Two hours later it was 3 degrees lower. What was his temperature then?
Andrew [12]

Answer:

99

Step-by-step explanation:

102-2=100

100-1=99

or

102-3=99

7 0
3 years ago
Read 2 more answers
Can u help me
fiasKO [112]

The diagram shows that FG = IJ are congruent segments due to the double tickmarks. These are the hypotenuses of the right triangles.

So that takes care of the "H" in "HL".

The L stands for "leg", so we need to have a congruent pair of corresponding legs.

Due to the orientation of the triangles, it's not clear how the corresponding legs match up, but if any of the following is true

  • EF = IK
  • EF = JK
  • EG = IK
  • EG = JK

then we'd have enough to use HL.

4 0
3 years ago
A $280 suit is marked down by 20%. Find the sale price.
Liula [17]

Answer:

I believe its $56... 280*.20=56

Step-by-step explanation:

4 0
3 years ago
If $580 is invested in an account which earns 9% interest compounded annually, what will be the balance of the account at the en
joja [24]
The formula for compounded interest is A = P (1+r/n)^nt.
P=580 
r = .09
n = 1
t = 9
<span>
To find how much the balance is at the end of nine years, plug in all of the knows into the formula.</span>
A = 1259.698 is how much the balance will be. (Rounded to 1259.70 if you round to the nearest cent).



8 0
4 years ago
Solve the quadratic equation: 2 + 4 = 0
dalvyx [7]

Answers is 6=0 I think.

2 + 4 = 0 \\ 6 = 0

8 0
3 years ago
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