There were 3 times as many boys as girls in a museum. After 75 boys left and 25 girls entered, there were 2 times as many girls as boys. If 90 children remained, how many children were in the museum at first? *

Answer:

6 or 60. 45 is in it. Best I can explain

Answer:

162

Step-by-step explanation:

step 1. our output value is 360

step 2. we represent the unknown value with x

step3. from step 1 above, 360= 100%

step 4. similarity, x=45%

step 5. this result in a pair of simple equations

360=100%(1)

x=45%(2)

step 6. by dividing equation 1 and 2 and noting that both the RHS (right hand side) of both equations have the same unit (%); we have

360/x = 45/100

x=162

therefore, 45% of 360 is 162

hope this helps!!!

Answer:

$48

Step-by-step explanation:

He will earn $16 interest for one year. After 3 years, that will triple to $48

Answer:

m=4/-3

Step-by-step explanation:

the equation for slope (m) when given two points is (y2-y1)/(x2-x1)

we are given the points (9,3) and (6,7)

we can label the points:

x1=9

y1=3

x2=6

y2=7

now substitute into the equation

m=(7-3)/(6-9)

subtract

m=4/-3

the slope is 4/-3

hope this helps!

Answer:

B 17.5 ft

Step-by-step explanation:

tangent = opposite / adjacent

tan 35° = h / 25

multiply both sides by 25

h = 25 (tan 35°)

tan 35° = 0.70 (from your calculator)

h = 25 (0.70)

h = 17.51 ft.

Answer: 12.57 ft

Step-by-step explanation:

Circumference of circle with radius of 4ft.

= π * radius * 2

= 22/7 * 4 * 2

= 25.14 ft

Circumference of circle with radius of 6ft.

= 22/7 * 6 * 2

= 37.71 ft

Difference = 37.71 - 25.14

= 12.57 ft

Answer:

61% increase if the airlines held a 50$ baggage fee

Step-by-step explanation:

Question isn't well formatted :

If I have 48 cards and and gave 10 to my friend and I have 38 left. what fraction of original number of card do I have left.

Answer:

0.7917

Step-by-step explanation:

If I have 48 cards and and gave 10 to my friend and I have 38 left what what fractionbb be is my original number of cards

Given that :

Total number of cards = 48

Number given to friend = 10

Number of cards left = 48 - 10 = 38

Number of cards left / original number of cards

38 / 48

= 0.7917

Answer:

x=27

Step-by-step explanation:

cos and sin are complementary angles. There theta or x add up to 90 degree. Using the formula.

cos x=sin y where x+y=90 let set up the equation.

[tex] \cos(2x + 9) = \sin(x) [/tex]

[tex]2x + 9 + x = 90[/tex]

[tex]3x + 9 = 90[/tex]

[tex]3x = 81[/tex]

[tex]x = 27[/tex]

To check our identity plug x in the top equation

[tex] \cos(2 \times 27 + 9)) = \sin(27) [/tex]

[tex] \cos(63) = \sin(27) [/tex]

they both equal about 0.45 so it is true.

x=27

Answer:

[tex]{ \large{ \implies{ \sf{(1 + 5 {}^{2} ) - 16{ \bigg( }\dfrac{1}{2} { \bigg)} {}^{3} }}}}[/tex]

[tex]{ \large{ \implies{ \sf{26 - { \cancel{16 } \: {}^{2} }\times \dfrac{1}{ \cancel{8} }}}}}[/tex]

[tex]{ \large{ \therefore{ \sf{26 - 2 }}}=} \: { \large{{ \boxed{ \sf{ 24}}} \: \: ans.}}[/tex]

Answer:

71.13

Step-by-step explanation:

The half area of a circle is A = 1/2 * pi*r^2 = 1/2 * pi * 3^2 or 9

The trapezoid is a rectangle and a triangle. Rectangle is 8*6 and the triangle is 6*(11 - 8) * 1/2

The total is 1/2 * pi * 9 + 8*6 + 6*(11 - 8) * 1/2 = 71.13

Answer:

351π cm^2.

Step-by-step explanation:

Area of shaded part = area of the large circle - area os small circle

= π * (13+7)^2 - π * 7^2

= 400π - 49π

= 351π.

Answer:

138

Step-by-step explanation:

Answer:

{-5/4, 8}

Step-by-step explanation:

We are given (4u + 5)(8 - u) = 0.  Solve for u by setting each of the factors (4u + 5) and (8 - u) equal to zero and solving each of the resulting equations:

4u + 5 = 0 leads to u = -5/4, and

8 - u = 0 leads to u = 8.

The solutions are {-5/4, 8}

Answer:

The answer is 1. f(a) = –2a^2 – 5a + 4. If a = -3, then to find f(-3) we have to substitute a in the general formula. f(a) = –2a^2 – 5a + 4 = -2 * a^2 – 5 * a + 4. Substitute a with -3. f(-3) = –2 * (-3)^2 – 5 * (-3) + 4 = -2 * 9 - (-15) + 4 = -18 + 15 + 4 = 1

Step-by-step explanation:

Answer:

x = 10, y = 12

Step-by-step explanation:

There is a 2:1 ratio between 16 and 8, alternate side lengths.

2x = 20

x = 10

2(6) = y

y = 12

ab=10 units

.......................

Answer:

$19

Step-by-step explanation:

first subtract 3 from 51 and that =48

then divide 48 between the 3 people and that equals 16

lastly add Kadens tip of 3$ which will equal $19.

Answer:

50º

Step-by-step explanation:

A triangles angles = 180º

Angle A = 40º

Angle C = 90º  (this is a right triangle)

40º + 90º = 130º

180º - 130 º = 50º

Okay i dont know

Step-by-step explanation:

Answer:

55°

Step-by-step explanation:

180 - 125 = 55

This diagram is not really to scale much but that would be the math you'd use to find angle m

Answer:

ok.

Step-by-step explanation:

Answer:

$8

Step-by-step explanation:

first you have to find one

0.5 ounce = $2.40 ÷ 3 = $0.80

1 ounce = 0.8 × 2 = $1.60

5 ounces $1.60 × 5 = $8

Answer:

Simplify: 8 2 − 1 3 + 2 2

Step-by-step explanation:

Solution: 1 0 2 − 1 3

Answer:

0.098

Step-by-step explanation:

It should be obvious that 0.098 is bigger than 0.046 and 0.059, so let's focus on 0.01

0.01 = 0.010 and again it should be obvious that it's smaller than 0.098

Answer:

5

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

Because when there in the ( ) and there a negative they turn into a positive

so its positive Five

Hope this Helps and i'm Sorry if it doesn't

Don Juan fue a la ferreteria a comprar una manguera para regar su jardín. Después de observar varias, eligió la que tiene la siguiente etiqueta. 83 pies, Diamtero interior 1/2 in. a) ¿Cuántos metros de longitud tiene la manguera que compró Don Juan? b) ¿Cuántos centímetros de diámetro interior tiene la manguera?

Responder:

25,30 m

1,27 cm

Explicación paso a paso:

Estamos obligados a convertir la longitud de la manguera de pies a metros y el diámetro de pulgadas a centímetros:

Longitud de la manguera = 83 pies

Recordar ;

1 pie = 0.3048 m

83 pies = (83 * 0.3048) = 25.2984 m

= 25,30 m

El diámetro de la manguera = 1/2 pulgadas

1 pulgada = 2,54 centímetros

1/2 pulgada = (1/2 * 2.54) cm

1/2 pulgada = 1,27 cm

Answer:

B

Step-by-step explanation:

-5(2x-4y)

-5*2x = -10y

-5*-4y = 20y

So, -10x+20y

Answer:

The answer is b

Step-by-step explanation: