In a middle school classroom there are 4 boys for every 6 girls. How many
boys would there be in a classroom with 30 student?

Answers

Answer 1

Answer:

12

Step-by-step explanation:

Answer 2

Answer:

12 boys

Step-by-step explanation:

4/(4+6) × 30

= 4/10 × 30

= 12


Related Questions

WILL MARK BRAINLIEST HELP ASAP ASAP

Answers

Answer:

B

Step-by-step explanation:

I got this answer correct on a test

(9.1 × 109)(7.5 × 102)

Answers

Answer:

758803.5

Step-by-step explanation:

that's what i got- no idea if it's right though-

The first one is 1,631.9 the second is 765.0

Find the length of the third side if necessary round to the nearest tenth

Answers

Answer:

H²=a²+b²

H²=4²+7²

H= 8.06

solve the equation d - 4= -12

d=16
d= - 16
d=8
d= - 8

Answers

-8 would be the correct answer!

If you have 10 skittles and you divide them to 100 how many do you have?

Answers

Answer:

1/10

Step-by-step explanation:

Which number line represents the solution to 5x < 30? F # 10 0 2 4 6 8 + 0 2 4 6 8 10 H +00 0 4 6 10 N J o 2 4 6 8 10​

Answers

Answer:G i think sorry if wrong

Step-by-step explanation:

Answer:G

Step-by-step explanation:

3-x1/2=y Given x = 4

Answers

Answer:

1

Step-by-step explanation:

3 - (4) 1/2

3 - 2

= 1

(10.04 MC)

What cosine function represents an amplitude of 3, a period of π, no horizontal shift, and a vertical shift of 2? (6 points)

Group of answer choices

f(x) = 3 cos 2x + 2

f(x) = 3 cos πx + 2

f(x) = 2 cos πx + 3

f(x) = 2 cos 2x + 3

Answers

Answer:

f

(

x

)

=

3

cos

(

2

x

)

+

2

EXPLANATION:

We are able to use the transformation formula

f

(

x

)

=

a

cos

(

x

h

b

)

+

k

. You start with

f

(

x

)

=

cos

(

x

)

and replace

a

with the desired amplitude,

h

with the desired horizontal shift, and

k

with the desired vertical shift. This leaves out the

b

-value. A regular cosine function has a period of

2

π

. If you want a period of

π

, since that is one half of the original period, you need to replace your

b

with a

1

2

.

This is about how it would work out.

f

(

x

)

=

3

cos

(

x

0

1

2

)

+

2

From there you simplify your equation giving you

f

(

x

)

=

3

cos

(

2

x

)

+

2

Answer:

f(x) = 3 cos 2x + 2

Step-by-step explanation:

got it right on the test.

PLEASEEE HELP!!!!
!!!ILL GIVE >>BRAINLIST<

Answers

Answer:

Step-by-step explanation:

Enter the
value of p so that the expression
3(n + 5) is equlvalent to (n + p)3

Answers

Answer:

p=5

Step-by-step explanation:

a(x+y) is also (x+y)a

So if 3(n+5) has to be equivalent to (n+p)3, then p has to be 5.

---

hope it helps

Answer this please 7= - w/8

Answers

Answer:

[tex]w = - 56[/tex]

Step-by-step explanation:

[tex]7 = \frac{ - w}{8} [/tex][tex] \frac{ -w }{8} = 7[/tex][tex] - 8 \times \frac{ - w}{8} = - 8 \times 7[/tex]

[tex] - 1 \times ( - w) = - 8 \times 7[/tex]

[tex]1 \times w = - 8 \times 7[/tex]

[tex]w = - 8 \times 7[/tex]

[tex]w = - 56[/tex]

Hope it is helpful....

Solve each equation for y (get into slope-intercept/y=mx + b form): a) 10x + 5y = 20 b) 3x - 2y = 10 + 4x
Don't forget to explain how you got the answers.

Answers

Answer:

see below

Step-by-step explanation:

We want to solve each equation for y, so y must be alone on one side of the equation.

a) 10x + 5y = 20

Subtract 10x from both sides.

5y = 20 - 10x

Place the x term in front to follow  y = mx + b form.

5y = -10x + 20

We want to isolate y completely, so divide both sides by 5. On the right side, be sure to divide each component by 5.

5y/5 = -10/5x + 20/5

y = -2x + 4

This equation is in slope-intercept form.

b) 3x - 2y = 10 + 4x

We can see that y is negative in this original equation. Let's add 2y to both sides to make y positive.

3x = 10 + 4x + 2y

Now we want to isolate y, so subtract 4x from both sides.

3x - 4x = 10 + 2y

Simplify.

-x = 10 + 2y

Isolate y further by subtracting 10 from both sides.

-x - 10 = 2y

Again, we want to isolate y completely, so divide both sides by 2. On the left side, be sure to divide each component by 2.

-x/2 - 10/2 = 2y/2

-1/2x - 5 = y

This looks backwards (although it is in slope-intercept form), so let's rearrange it just to make it more clear.

y = -1/2x - 5

This equation is in slope-intercept form.

Hope this helps!

21. identify the secant that intersects OA.

Answers

Answer: Line BC

=============================================================

Explanation:

A secant line cuts the circle so that part of the line is inside the circle, and the rest (or majority) of the line is outside the circle. In other words, the secant line intersects the circle at exactly two points.

This is in contrast to a tangent line that only touches the circle at exactly one point. Line L is the tangent line in this case.

Segment DC is a diameter of the circle as it goes through the center, and this segments endpoints are on the circle's edge. The segments AD and AC are radii of the circle.

Answer:

Line BC

Step-by-step explanation:

In the figure below mPUR =77 and mST=74 Find mPR

Answers

Answer:

a)

The angle formed by intersecting chords is half of the sum of the intercepted arcs:

1/2(mST + mPR) = m∠PUR1.2(74° + mPR) = 77°74° + mPR = 2*77°mPR = 154° - 74°mPR = 80°

b)

The angle formed by two tangents is the half of the difference of the intercepted arcs:

m∠PSR = 1/2(mPTR - mPR)m∠PSR = 1/2(247° - (360° - 247°))m∠PSR = 247° - 180°m∠PSR = 67°

How many lies of symmetry does this figure have ?

Answers

Answer:

B.

Step-by-step explanation:

You can draw draw ten lines through this figure to get symmetry either side.

- Find the value of x. Round to the nearest tenth of a unit.
100 ft
T
20°
O 34.2 ft
O 36.4ft
O 94 ft
O 292 ft

Answers

[tex]x = 34.2[/tex]

[tex] \sin(20) = \frac{x}{100} \\ 0.3 = \frac{x}{100 } \\x = 100 \times 0.3 = 34.2[/tex]

Solve for x : (X+4) (x-3) =0

Answers

Answer:

x=-4,3

Step-by-step explanation:

x+4=0

x=-4

x-3=0

x=3

Persuade Mr.Zorn whether the numbers 12, 16, and 20 make a right triangle or not. make sure to state reasons for and against your belief. *

Answers

Answer:

They don’t 12+16+20= 48

12 x 16 x 20= 3840

Step-by-step explanation:

Help me.............

Answers

just add all the numbers together and then divide them by how many numbers there were, and youll find the mode (average)

the lat one u just subtract 30 from 45, and find how many more scores

HELP PLEASE! I NEED TO SUBMIT SOONN!!
I WILL GIVE ALOT OF BRAINLIST
2. For what value of x will the
rectangle at the right be a
square?

Answers

Answer:

x=1

Step-by-step explanation:

x+2=2x+1

x=1

sides of a square must be equal

PLZ PLZ PLZ I GIVE BRAINLIEST ANSWER PLZ

Answers

The midpoint should be (3,-2)

Answer:

[tex] \sqrt{ {( - 1 - 4)}^{2} + {(2 - ( - 3))}^{2} } = \sqrt{ {5}^{2} + {5}^{2} } = 5 \sqrt{2} [/tex]

Marla made $42 babysitting
for 5 hour's. How much money
did she make each hour?
A $8,40
B. 18.10
C. $1.90
D. $11.90
Help please

Answers

Answer: she made $8.40

Step-by-step explanation: divide 42 by 5 to get your answer

Answer:

A - $8.40

Step-by-step explanation:

You would have to do 45÷5

PLZ PLZ PLZ HELP ME PLSSSSS

Answers

Answer:

x = 70

Step-by-step explanation:

Answer:

Step-by-step explanation:

b/c we know that the inside angles of a triangle add to 180

180 = 38 + x + x + 2

180 = 40 + 2x

140 = 2x

70 = x

In hopes of encouraging healthier snacks at school, Pete brought in a tray of carrot sticks and apple slices to share. The tray had a total of 70 snacks, of which 90% were carrot sticks. How many carrot sticks did Pete bring?

Answers

Answer:

pete brought 63 carrots

Step-by-step explanation:

70 x .90 = 63

Triangle HIJ is similar to triangle KLM. Find the measure of side LM. round your answer to the nearest tenth

Answers

Answer:

5.3

Step-by-step explanation:

27.8/37 = x/7

37x = 194.6

x=5.25

x=5.3

Mona has a bag containing 4 red marbles, 12 greens marbles, and 8 black marbles. Without looking, she pulls out one marble from the bag and places it in an empty jar. She then pulls a second marble from the bag and places it in the jar. What is the probability that she will have 2 red marbles in the jar?

Answers

Answer: C (4/24*3/23)

Step-by-step explanation:

4 red

12 green

8 black

24 total

pulling red on the first pull:

4/24

pulling red on the second pull:

3/23

so C

Alejandro compra un terreno de 0,3 hm cuadrados y 0,9 dam al cuadrados ¿cuanto ha pagado por el terreno

Answers

Answer:

Si el metro cuadrado es a $ 50 Alejadro pagó por el terreno  $195 000

Step-by-step explanation:

Ya que no se especifica un valor por unidad de área podemos suponer por  ejemplo $ 50 / metro^2

Terreno:

0.3 hm^2

0.9 dam^2

1) Vamos convertir a la misma unidad de área las áreas del terreno para poder saber su costo.

-Hectómetro cuadrado

1 hm^2  = 10 000 m^2

Por lo tanto,

0.3 hm^2 * 10 000 m^2 /  1 hm^2 = 3000 m^2

-Decámetro cuadrado

1 dam^2  = 1 000 m^2

Por lo tanto,

0.9 dam^2 *  1 000 m^2 /1 dam^2  = 900  m^2

Así que el total del terreno es de 3900 m^2

2) Ahora podemos calcular el valor total del terreno

area* valor (por m^2)

3900  m^2  * $50/ m^2 =  $195 000

If a radius of a circle is 30 inches then it’s diameter is what? Please help ty!

Answers

Answer:

60 inches

Step-by-step explanation:

Radius is 1/2 of a diameter, so diameter is twice a radius. 30 x 2 = 60 inches

Hope that helps! :)

-Aphrodite

A LITTLE HELP PLEASEEE!!

Answers

Answer:

i think it’s the 5th one

Step-by-step explanation:

if noah ran 45 minutes and john ran 6 more minutes the noah how many minutes did john run? please help

Answers

Answer:51 minutes

Step-by-step explanation:

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