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RUDIKE [14]
2 years ago
8

Help me i really need this .no spam​

Mathematics
1 answer:
Naya [18.7K]2 years ago
4 0

<u>Question</u> : 8

11 \sqrt{5}  + 4 \sqrt{7}

<u>Question</u> : 9

  • x =  - 1
  • y =  - 3

<u>Question</u> : 11

  • LHS isn't equal to RHS

<u>Question</u> : 12

  • x =  \dfrac{ \sqrt{3} }{2 \sqrt{2} }

Solution is in attachment ~

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3. A sign company is building a sign with the dimensions shown. What is the area, in square feet, of the sign? Round to the near
Aleks04 [339]

Answer:

84.87sq ft

Step-by-step explanation:

Let ABC be the triangle and  AD be the perpendicular on BC such that BD=DC=7ft.

Now, it is known that \frac{DC}{AC}=cos60^{0}

AC=\frac{7}{\frac{1}{2}}

AC=7ft

Now, in triangle ADC, we have

(AC)^{2}=(AD)^{2}+(DC)^{2}

(14)^{2}=(AD)^{2}+(7)^{2}

196-49=(AD)^{2}

AD=12.12ft

Now, area of the triangle=\frac{1}{2}{\times}b{\times}h

=\frac{1}{2}{\times}14{\times}12.12

=84.87sq ft

Thus, area of the building is 84.87sq ft.

8 0
2 years ago
Can someone pls help me quickly
nydimaria [60]

Answer:

B AND F

Step-by-step explanation:

!!!!!!!!

4 0
2 years ago
Someone please help out?
Delvig [45]
I dont know im trying to figure that out

7 0
3 years ago
Forty discrete math students are to be divided into eight discussion groups, each consisting of five students. In how many ways
VARVARA [1.3K]

Answer:

<h2>76904685 ways</h2>

Step-by-step explanation:

Given data

the number of students n=40

the number of groups r= 8

We are going to use the combination approach to solve the problem

nCr= n!/r!(n-r)!

substituting into the expression for the number of ways we have

40C8= 40!/8!(40-8)!

nCr= 40!/8!(32)!

nCr= 40!/8!(32)!

nCr= 40*39*38*37*36*35*34*33*32!/8!(32)!

nCr= 40*39*38*37*36*35*34*33*/8!

nCr= 40*39*38*37*36*35*34*33*/8*7*6*5*4*3*2

nCr= 3100796899200/40320

nCr=76904685 ways

4 0
3 years ago
Which table contains only points that lie on the line of the equation y = 6x - 6?​
Fittoniya [83]

Answer:

The answer is G

Step-by-step explanation:

2 x 6 = 12

12 - 6 = 6

_________

-2 x 6 = -12

-12 - 6 = (-18)

7 0
3 years ago
Read 2 more answers
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