8x + y = 20
x - 2y = -6

Answer:

50.2in or 4.2ft

Step-by-step explanation:

This is a problem about proportions so I generally set up my problems like below. I just set some variable here to make it easier to refer back to the measurements for each. You don't have to do this, I am just showing it for clarity. I will convert everything to inches too. We need to find the real window height.

Mb = model building = 18in

Mw= model window = [tex]\frac{1}{9}[/tex]in

Rb = real building = 678ft = 8136in

Rw = real window = ?

[tex]\frac{Mw}{Mb}[/tex] = [tex]\frac{Rw}{Rb}[/tex]

[tex]\frac{1/9}{18}[/tex] = [tex]\frac{Rw}{8136}[/tex]

[tex]\frac{1}{9*18}[/tex] = [tex]\frac{Rw}{8136}[/tex]  

[tex]\frac{1}{162}[/tex] = [tex]\frac{Rw}{8136}[/tex]

[tex]\frac{1*8136}{162}[/tex]= [tex]\frac{8136*Rw}{8136}[/tex]

[tex]\frac{8136}{162}[/tex] = Rw

[tex]\frac{452}{9}[/tex] = Rw

Rw ≈ 50.2in ≈ 4.2ft

Answer:

70 x 15 = 1050

Step-by-step explanation:

do your work lol

(7×10¹⁰) × (3×10²)

(7×3) × (10¹⁰×10²)

21 ×10¹²

W standard form can only be between 1 and 10, so in standard form,

21÷10=2.1

10¹²+¹

10¹³

2.1×10¹³

Please mark BRAINLIEST!

Answer:

each jewel was 3 $

Step-by-step explanation:

divide 108.00/36= 3

Step-by-step explanation:

$3 for each jewel.

Answer:

75

Step-by-step explanation:

5(6+9)

Times the five by the numbers in the bracket

30 + 45

= 75

Answer:

75

Step-by-step explanation:

5 x 6 = 30

5 x 9 = 45

30 + 45 = 75

Answer:

a

Step-by-step explanation:

Answer:

the answer is 145°

Step-by-step explanation:

seeing as the two largest angles are 50° and 95° we add them and the answer is 145°

that's what I think :)

Answer:

They are all in standard form

Step-by-step explanation:

Answer:

x txrxrserfunvek ke r CPP

1) y=75x+125

2)y=75(5)+125

=375+125

=500$

Answer:

x=6

Step-by-step explanation:

Solve for  x  by simplifying both sides of the equation, then isolating the variable.

Answer:

-7/5

Step-by-step explanation:

7×5=35

35+1=36

7 1/5 = 36/5

8×5=40

40+3=43

8 3/5 = 43/5

36/5 - 43/5 = 36-43/5=-7/5

Answer:

7 +(-8) +1/5 +( -3/5 )

Step-by-step explanation:

I got it correct!

Answer:

Step-by-step explanation:

You have to factor but we start by simplifying both sides which will be x^2-4x+4=36. Then you subtract 36 from both sides

x^2-4x+4-36=36-36

x2-4x-32

Now that the equation is set up, you can factor

(x+4)(x-8)Set the factors equal to 0

x=-4 or

x=8

Answer:

2+2-5=6 is false.

Step-by-step explanation:

2+2 = 4

4-5 = -1

-1 does not equal 6, so the equation is false.

Also, I like Stranger Things, but my advice to you is to not try to meet people on brainly like this because 1 you can get banned, and 2 you have no idea who you might be talking to or if they're dangerous or not.

Answer:

the person who are not in mannered

they like strangers things.

For examples

one person who are well mannered they all know what we can do or what we cannot do.

Answer:

Step-by-step explanation:

The simple formula for slope is: [tex]\frac{rise}{run}[/tex] or "rise over run".

The rise is 3 and run is 2.

Hope it helped :)

Answer:

x = 41

y = 65

z = 107

Step-by-step explanation:

y and 65 are vertically opposite angles. Vertically opposite angles are equal.

y = 65

74 + y + x = 180

74 + 65 + x = 180

139 + x = 180

x = 180 - 139

x = 41

z is the exterior angle, whereas 66 and x are interior angles in a triangle.

Formula : -

Exterior angle = Sum of two interior angles

z = 66 + x

  = 66 + 41

z = 107

y=-2x+[-1]

Hope it is correct

Answer:

The answer I was able to get was 0.

Answer:

4x+9=x+15

x = 2

Step-by-step explanation:

Let's solve this equation I just made:

4x + 9 = x + 15

Subtract 9 from each side:

4x = x + 6

Subtract x from each side:

3x = 6

Divide each side by 3:

x = 2

Answer:

I believe it's 90y

Step-by-step explanation:

12 × 7 = 84, then you add 6, which is half of 12, to get 90.

Please let me know if I'm wrong.

Answer:

[tex] - 3(3y - 2x) + 2(5x - 4y) \\ - 9y + 6x + 10x - 8y \\ 16x - 17y[/tex]

I hope I helped you^_^

Answer:

27 students

Step-by-step explanation:

b/c 1/4×60=15 students

3/10×60=18

18+15=33

60-33=27

brainlist please

Answer:

45

Step-by-step explanation:

45! £€#^_#÷5€£¥¥*^

Answer:

about 0.10 cents a unit

Step-by-step explanation:

If I'm wrong, I'm sorry!!

I hope you have a great day! Good luck with your math!

2² × 23

Step-by-step explanation:

92 = 2 × 46

92 = 2 × 2 × 23

92 = 2² × 23

Answer:

Neither, they are both equal.

Step-by-step explanation:

FYI, that three in front of the radical in the first expression is actually cube root. The cube root of 64 is 4, and the square root of 16 is 4.

[tex]\sqrt[3]{64} =4\\\sqrt{16}=4\\4=4[/tex]

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\textsf{Option A }\huge\boxed {\downarrow}[/tex]

[tex]\huge\boxed{\rm{\sqrt[3]{64}}}}\\\huge\boxed{= \rm{\sqrt[3]{4^3}}}}\\\huge\boxed{= \rm{\sqrt[3]{4\times4 \times4}}}\\\huge\boxed{\rm{\rightarrow \sqrt{64}= 8, \ because \ 8\times8 = \bf 64}}\\\huge\boxed{\rm{{= \dfrac{8}{2}\rightarrow 8\div 2 \rightarrow \bf 4}}}[/tex]

[tex]\huge\boxed{\textsf{Option A.) answer: \bf 4}}[/tex]

[tex]\huge\textsf{Possible Option A. part II }\huge\boxed\downarrow[/tex]

[tex]\huge\boxed{\rm{\sqrt{64} = \sqrt{8\times8}= \bf 8}}\\\huge\boxed{\text{Possible answer for Option A. part II: \bf 8}}[/tex]

[tex]\huge\textsf{Option B }\huge\boxed\downarrow[/tex]

[tex]\huge\boxed{\rm{\sqrt{16}}}\\\huge\boxed{\rm{= \sqrt{4\times4}}}\\\huge\boxed{\rm{= \sqrt{16} \rightarrow \bold{4}\rightarrow 4\times4 \rightarrow \bf 16}}[/tex]

[tex]\huge\boxed{\textsf{Option B.) answer: \bf 4}}[/tex]

[tex]\huge\boxed{{\textsf{Based on the given information \boxed{\textsf{\bf NEITHER}} is}}}\\\huge\boxed{\textsf{the answer because it seems reasonable \& both}}\\\huge\boxed{\textsf{choices are very much equivalent to each other}}\huge\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]