Write a proportion to solve this problem: if 12 math books weigh 40 pounds, how much would 21 math books weigh

Answer:

61 miles

Step-by-step explanation:

1 / 6 = 1/6

1/6 * 366 = 61

1/6 of 366 is 61

We can check our answer by multiplying 61 and 6 since we divided 366 and 6

61 * 6 = 366

Now that we have checked our answer, we can comfirm that 366 divided by 6 is 61 therefore, our answer is 61 miles in 1 hour

Answer:

5

Step-by-step explanation:

l

Answer:

-6<-2?

Step-by-step explanation:

Step-by-step explanation:

11.

tan 30 = perpendicular / base = x/ 7

1/√3 = x/7

X= 7/√3

2.

cos 30 = 7/y

√3/2 = 7/y

y = 7×2/ √3

y= 14/√3

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Answer:

Answer:

$14.75 but if includ the money her uncle gave her than it’s $24.75

Step-by-step explanation:

Answer:

9 is an extraneous solution.

Step-by-step explanation:

Answer:

I think its A

Step-by-step explanation:

I eliminated C and D but am not 100% sure between a and b i think its right im not sure sorry

Answer:

[tex] \tan(J) =\frac{5\sqrt{66}}{66} [/tex]

Step-by-step explanation:

[tex] \tan(J) =\frac{5}{\sqrt{66}} [/tex]

[tex] \tan(J) =\frac{5}{\sqrt{66}} \times \frac{\sqrt{66}}{\sqrt{66}} [/tex]

[tex] \tan(J) =\frac{5\sqrt{66}}{\sqrt{66}\times\sqrt{66} } [/tex]

[tex] \tan(J) =\frac{5\sqrt{66}}{66} [/tex]

Answer:

Whats the question!?!?!? D:

Step-by-step explanation:

Answer:

113 - 180 = 67 degrees

Step-by-step explanation:

113 degrees from 180 degrees equals 67 degrees

Answer: thank you

Step-by-step explanation:

Answer: The first two

Step-by-step explanation:

Answer:

9   1/2

Step-by-step explanation:

Answer: 9 1/2

Step-by-step explanation:

Answer:

Image result for what event started the 100 years war

The Hundred Years' War was fought between France and England during the late Middle Ages. It lasted 116 years from 1337 to 1453. The war started because Charles IV of France died in 1328 without an immediate male heir

Step-by-step explanation:

So it would be C

Answer:

Philip VI took English land

Step-by-step explanation:

"By convention, the Hundred Years' War is said to have started on May 24, 1337, with the confiscation of the English-held duchy of Guyenne by French King Philip VI." - Encyclopedia Britannica

Answer:

[tex]x^{2}[/tex]-25

Step-by-step explanation:

formula for areas of rectangles= width x height

width=x-5

height=x+5

(x-5)(x+5)= [tex]x^{2}[/tex]-5x+5x-25

since the 5x's cancel out each other

              =[tex]x^{2}[/tex]-25 will be the answer

The area of rectangle is [tex](x^{2} -25)[/tex] unit square.

The area of rectangle is product of length and width.

         [tex]Area = length*width[/tex]

Given that length is [tex](x+5)[/tex] and width is [tex](x-5)[/tex].

    [tex]Area=(x+5)*(x-5)\\\\Area=x^{2} -5x+5x-25=x^{2} -25[/tex]

Hence, the  area of rectangle is [tex](x^{2} -25)[/tex] unit square.

Learn more:

https://brainly.com/question/20968176

Answer:

12x-3 if you need a value for x i got nothing

Answer:

65 miles per day

Give my a brain baby

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

Answer:

a=7

Step-by-step explanation:

step one: divide both sides by 2

now you will have  [tex]a=\frac{14}{2}[/tex]

step two: divide 14 by 2

14/2 is 7 so a is equal to 7

Answer:

see explanation

Step-by-step explanation:

(a)

The angle around the centre O of the circle = 360°, then

∠ AOB = 360° - 260° = 100°

Δ AOB is isosceles ( the radii OA and OB are congruent )

The altitude from O bisects ∠ AOB , thus

y = 50°

Since the triangle is isosceles the 2 base angles are congruent, so

x = [tex]\frac{180-100}{2}[/tex] = [tex]\frac{80}{2}[/tex] = 40°

(b)

∠ POR = 360° - 254° = 106°

Δ POR is isosceles (the radii OP and OR are congruent ) , then

the 2 base angles are congruent , thus

a = [tex]\frac{180-106}{2}[/tex] = [tex]\frac{74}{2}[/tex] = 37°

Answer:

m<1 = 60° if m<7=60°

Step-by-step explanation:

The are the same angle degree.

Answer:

Step-by-step explanation:

-40x + 8y = -24

 3x  -  8y = 24

-37x = 0

x = 0

0 + y = -3

y = -3

(0, -3)

Answer:

I will show you how to solve for x and y.

Step-by-step explanation:

-5x + y = -3

3x - 8y = 24

You can isolate y in the first equation, and substitute that into the second equation.

so to isolate y in -5x + y = -3, you would add 5x to both sides

this gives you y = 5x - 3

Then substitute this y into the equation below.

3x - 8(5x-3) = 24     (this way, the y variable disappears)

then distribute the 8 into the bracket

3x - 40x + 24 = 24

combine the variables

-37x + 24 = 24

isolate x by moving the constants to one side

-37x = 0

so x = 0

I am not sure if you want the rest, but here it is.

substitute x = 0 into one of the equations.

-5x + y = -3

-5(0) + y = -3

y = -3

Answer: I would say that the one which you have selected is correct.

Step-by-step explanation:

I really do hope that I am right and this helps you!

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Answer:

d

Step-by-step explanation:

Answer:

c?

Step-by-step explanation:

Answer:

y=5x+3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(-7-8)/(-2-1)

m=-15/-3

m=5

y-y1=m(x-x1)

y-8=5(x-1)

y=5x-5+8

y=5x+3

Answer:

x=2

y=-8

Step-by-step explanation:

6x+3y=-12

-6x-2y=4

3y=-12-6x

y=(-12-6x)/3

y=-4-2x

substitute y

-6x-2(-4-2x)=4

-6x+8+4x=4

-2x=-4

x=2

6(2)+3y=-12

12+3y=-12

3y=-24

y=-8

check:

6(2)+3(-8)=-12

12-24=-12

-6(2)-2(-8)=4

-12=16=4

Answer: 38

Step-by-step explanation:

Answer:

Perimeter= 38, EC- Area= 19.5

Step-by-step explanation:

substitute all the x's for 5. simplify each equation. H=3, Base= 13, 4x+2=22

h- 5-2=3

4(5)+2=22

base- 2(5)=3=13

then add all answers together to get 38.

multiply 13 and 3 to get 39, then divide by 2 to get 19.5 for the area.

Answer:

B.

Step-by-step explanation: