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weeeeeb [17]
3 years ago
14

Q5. The ratio of boys to girls in a group is 7:1. If there are 48 more boys

Mathematics
1 answer:
Airida [17]3 years ago
6 0

Answer:

There are 8 girls

Step-by-step explanation:

We see that right now there are 6 more boys than girls and if there were 2 girls there would be 14 boys meaning there would be 12 more boys than girls if you continue in this pattern you would get-

7:1= 6 more boys                   35:5=30 more boys                                                

14:2= 12 more boys                42:6= 36 more boys

21:3=18 more boys                 49:7= 42 more boys

28:4= 24 more boys               56:8= 48 more

This shows us that if there are 8 girls in  group there are 56 boys meaning there are 48 more boys than girls if the group had 8 girls

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For what values of x will make the following statement true?
Serhud [2]

The value of x that will make the statement true is 1

Step-by-step explanation:

The given is:

  • f(x) = x - 4
  • g(x) = 2x + 3

We need to find the value of x which makes [f(x) + 2g(x)] = 7

∵ f(x) = x - 4

∵ g(x) = 2x + 3

∵ f(x) + 2g(x) = 7

- Multiply g(x) by 2

∵ 2g(x) = 2(2x + 3) = 2(2x) + 2(3) = 4x + 6

∴ 2g(x) = 4x + 6

∵ f(x) + 2g(x) = 7

∴ (x - 4) + (4x + 6) = 7

- Add the like terms in the left hand side

∴ (x + 4x) + (-4 + 6) = 7

∴ 5x + 2 = 7

- Subtract 2 from both sides

∴ 5x = 5

- Divide both sides by 5

∴ x = 1

The value of x that will make the statement true is 1

Learn more:

You can learn more about the equations in brainly.com/question/1284310

#LearnwithBrainly

5 0
3 years ago
The sales tax rate on groceries in a certain state is 9%. If the price of a grocery item before sales
Damm [24]

Answer:

1.09g

Step-by-step explanation:

7 0
2 years ago
Write an equation in slope-intercept form for the line passing through the pair of points. (–1, 2), (4, –3)
dybincka [34]

Answer:

y = - x + 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (- 1, 2) and (x₂, y₂ ) = (4, - 3)

m = \frac{-3-2}{4+1} = \frac{-5}{5} = -1, hence

y = - x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (- 1, 2), then

2 = 1 + c ⇒ c = 2 - 1 = 1

y = - x + 1 ← equation in slope- intercept form

8 0
3 years ago
A zipline is constructed over a ravine as shown in the diagram at the right. What is the horizontal distance from the bottom of
Katyanochek1 [597]

Answer: X= 284.04

To solve for x, you must first find the missing angle in the left corner. I will name it "< Y" (Angle Y)

2

Sin50/250 = SinY/60

Set up your problem, then cross multiply.

3

60(Sin50)= 250(Sin Y)

60(Sin50)/250= Sin Y

After cross multiplying, you should be left with this. You then cancel out 250 by dividing it on both sides to get Sin Y by itself.

4

Sin Y = 0.183

Y= Sin-1 x 0.183

This is what it solves out to.

Now you cancel out Sin on both sides, and it should look like the bottom problem.

5

Y= 10.5

This is now your answer to plug into the problem needed to solve for X.

6

Now because you have 2 out of 3 angles, you can solve for the missing angle that lays opposite to x. ( in SOHCAHTOA you need the OPPOSITE and the HYPOTENUSE. The Hypotenuse is originally give, but we had to do extra solving to find the Opposite's degree.)

7

Because degree's in a triangle add to 180, we will add 50 degrees + 10.5 degrees to get 60.5 degrees. Now subtract 60.5 from the full 180 degrees and we get 119.5 degrees as the missing number that lays opposite from X. Now we can solve for X.

8

(Sin 119.5)/x = (Sin 50)/250

Set up your final problem as so and cross multiply.

9

X(Sin 50) = 250(Sin 119.5)

X = 250(Sin119.5)/(Sin50)

After cross multiplying, the problem should look like the one at the top. Cancel out Sin 50 to get X by itself by dividing both sides by Sin 50, then solve for X.

Step-by-step explanation:

8 0
3 years ago
Simplify 9 - 3x - (-8y) + 9x -y
Ugo [173]
<span>9 - 3x - (-8y) + 9x -y
9 - 3x + 8y + 9x - y
9 - 3x + 9x + 8y - y
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4 years ago
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