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Artemon [7]
3 years ago
12

PLS HURRY 50 POINTS

Mathematics
2 answers:
Varvara68 [4.7K]3 years ago
8 0

Answer:

[6+√-64 ]x 3-√-16

6+8 x3+4

14 x 7

=98

Step-by-step explanation:

pashok25 [27]3 years ago
7 0

\\ \sf\longmapsto [6+\sqrt{-64}]\times 3-\sqrt{-16}

\\ \sf\longmapsto (6+8i)(3-4i)

\\ \sf\longmapsto 6(3-4i)+8i(3-4i)

\\ \sf\longmapsto 18-24i+24i+32

\\ \sf\longmapsto 18+32

\\ \sf\longmapsto 50

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asambeis [7]

Answer: 1 < x < 13

Step-by-step explanation: 7-6 is 1 so 1 is the lowest and 7+6= 13 so 13 is the highest possibility for it still to be a triangle.

3 0
3 years ago
How to factor quadratic expressions in General
serg [7]
3x^2 - 4x  - 7 = (3x - 7)(x +1)

hope it helps
5 0
3 years ago
Mrs.Duncans bill at a restaurant was $24.00 before tax. The sales tax rate was 8.25% and Mrs.Duncan also included a $5 tip. What
erica [24]
30.98$
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6 0
3 years ago
Read 2 more answers
five students ran a race. their times were 51, 53, 55, 56, and 60 seconds. which of these times does a sixth student have to run
Bezzdna [24]
B. 55 seconds
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3 0
3 years ago
Please answer quickly
Aleks04 [339]

Answer:

<em> -√5/5</em>

Step-by-step explanation:

Given the following

sin(A) = 4/5

sinB - -2√5/5

SinA = 4/5 = opp/hyp

We can get cosA

opposite = 4

hypotenuse = 5

Adj = √5²-4² (pythagoras theorem)

Adj = √25-16

Adj = √9

Adj = 3

Cos A = Adj/hyp

Cos A = 3/5

Also

Sin B = -2√5/5 = opp/hyp

opposite = -2√5

hypotenuse = 5

Adj = √5²-(2√5)² (pythagoras theorem)

Adj = √25-20

Adj = √5

Cos B = Adj/hyp

Cos B =  √5/5

Evaluate cos (A-B)

cos (A-B) = cosAcosB + sinAsinB

cos (A-B) = 3/5(√5/5)+4/5(-2√5/5)

cos (A-B)  = 3√5/25 - 8√5/25

cos (A-B) = -5√5/25

cos (A-B) = -√5/5

<em>Hence the value of cos (A-B) is -√5/5</em>

8 0
3 years ago
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