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jeka94
3 years ago
6

Anyone know the answer to this ?

Mathematics
1 answer:
olga55 [171]3 years ago
7 0
A. 6, 6, 24, 36
B. 5, 1, 12, 5
C. 8, 4, 24, 32
D. 8, 2, 20, 16
E. 8, 6, 28, 48
F. 7, 3, 20, 21
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The ratio of boys to girls in Mr. Baker's social studies class is 2 to 3. If there are 30 total students in the class, how many
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Answer:

12

Step-by-step explanation:

1st of all we should let the ration of boys to girls be 2x and 3x.

After that we should make the sum between 2x and3×and the sum of 2numbers is equal to 30

i.e.2x+3x=30

Then ,by solving this eqation we get the value of x=6

After that put the value of x in the number of boys

i.e.

2x=2×6=12

Hence ,the number of boys is 12

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What an inequality in your OWN words
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Inequality is when people or things are not the same or dont have the same benefits.

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3 years ago
What is the value of the expression 5x2-8x+4 when x = -3
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5 x 2 - 8x + 4

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7 0
3 years ago
Select the correct answer from each drop-down menu. Quadrilateral PQRS, with vertex P(-5, -3), undergoes a transformation to for
anygoal [31]

Answer:

i) A. 180º rotation about the origin, ii) Q' = (4, 5).

Step-by-step explanation:

i) In this case, we understand that vertex P = (-5,-3) changed to P' = (5,3) after doing an operation. At first we must calculate the distance of each point regarding origin by Pythagorean Theorem:

Point P:

OP = \sqrt{(x_{P}-x_{O})^{2}+(y_{P}-y_{O})^{2}}

If we know that x_{P} = -5, y_{P} = -3, x_{O} = 0 and y_{O} = 0, the distance OP is:

OP = \sqrt{(-5-0)^{2}+(-3-0)^{2}}

OP \approx 5.831

Point P':

OP' = \sqrt{(x_{P'}-x_{O})^{2}+(y_{P'}-y_{O})^{2}}

If we know that x_{P'} = 5, y_{P'} = 3, x_{O} = 0 and y_{O} = 0, the distance OP' is:

OP' = \sqrt{(5-0)^{2}+(3-0)^{2}}

OP' \approx 5.831

As OP = OP', origin is the center of rotation.

Besides, P' is a multiple of P, that is:

1) (-5, -3) Given

2) ((-1)\cdot 5, (-1)\cdot 3) (-a)\cdot b = -a\cdot b

3) (-1)\cdot (5, 3) Scalar multiplication of a vector/Result.

The value of the scalar proves that P experimented a 180º rotation about the origin. Hence, the correct answer is A.

ii) If Q = (-4, -5) and the same operation described in item i) is used, then, the location of Q' is:

Q' = (-1)\cdot Q

Q' = (-1) \cdot (-4,-5)

Q' = ((-1)\cdot (-4), (-1)\cdot (-5))

Q' = (4, 5)

Which corresponds to option C.

7 0
3 years ago
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