MATHEMATICS HIGH SCHOOL

If f(x)=2x^2+5 square root (x-2)
complete the following statement
f(3)=___

Answers

Answer 1
Answer:

Answer:

f(3)=23

Step-by-step explanation:

f(x) = 2x {}^(2) + 5 \n f(2) = 2 * 4 + 5

f(2) = 2 * 9 = 18 \n f(3) = 2x {}^(3) + 5

f3 = 2(3) {}^(3) + 5 \n f3 = 18 + 5

f3 = 23

hope I helped

plz mark as brainliest answer

Answer 2
Answer:

Answer:

f(3)=2(3)^2 + 5 * sqr(3-2)

= 2 * 9 + 5 * 1

= 18 + 5

= 23.

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Which of the following steps could be used as a shortcut method to multiply 12 by 50?A. Divide 12 by 2, then multiply that result by 50 B. Add 12 and 50, then multiply that result by 10 C. Multiply 12 by 100, then divide that result by 2 D. Multiply 12 by 5 and then multiply that result by 100
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Convert the equation from standard to slope-intercept form.
10x – 2y = -6

Answers

Answer:

The answer would be y = 5x + 3

Step-by-step explanation:

What adds to -2 and multiplies to 15

Answers

If you meant -15

the -5 and 3

3-5=-2
-3x5=-15
(-5) + 3 = -2(-5) × 3 = -15I can't think of one that multiplies to give positive 15 and also adds to give -2.

Donnie is solving the equation 2x2 = 27 + 3x with the quadratic formula.What values should he use for a, b, and c

Answers

2x^2 = 27 + 3x \n \n2x2 -3x-27=0 \n \n a=2 , \ b = -3 , \ c=-27 \n \n\Delta = b^(2)-4ac = (-3)^(2)-4*2*(-27)= 9+216 =225\n \nx_(1)=(-b-√(\Delta ))/(2a) =(3-√(225))/(2*2)=(3-15)/(4) =(-12)/(4)= -3\n \nx_(2)=(-b+√(\Delta ))/(2a) = (3+√(225))/(2*2)=(3+15)/(4) =(18)/(4)= (9)/(2)=4.5

The seventh-grade class is building target areas for a PE activity. The bases for the game will be in a circular shape. The diameter of each circle is 3 feet. Approximately, how many square feet of the turf need to be painted for a base circle? Use 3.14 for π and round your answer to the nearest tenth. 7.1 square feet
9.4 square feet
18.8 square feet
28.3 square feet

Answers

Answer:

7.1 square feet

Step-by-step explanation:

Since the diameter of a circle is twice the radius, the radius of each circle is 3/2=1.5. The area of a circle is \pi r^2=\pi \cdot 1.5^2=2.25\pi \approx 7.1. Hope this helps!

Answer:

18.8

Step-by-step explanation:

When 80% of a is added to the number, the result is 252. What is the number

Answers

Use the equation .8x + x = 252
x is the number, and .8 is the decimal equivalent of 80%.

1.8x = 252

x = 140

Final answer:

To find the original number, 'a', in this algebra problem, we set up and simplify the equation a + 0.80a = 252 to get a = 252 ÷ 1.80. Solving this equation will give us the value of 'a'.

Explanation:

The subject here is mathematics, specifically algebra. The problem can be solved by setting up an equation that represents the described scenario. Let 'a' be the unknown number. The problem states that adding 80% of 'a' to the number gives us 252. This can be expressed as the equation: a + 0.80a = 252.

By simplifying this equation, we get 1.80a = 252. To find the value of 'a', we divide both sides of the equation by 1.80. Doing that, we get a = 252 ÷ 1.80. Hence solving this will give us the original number

Learn more about Algebra here:

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Which choice explains the correct way to move the decimal point to find the quotient in the problem 265.786 ÷ 10? plzz hurry plz help me I need help

Answers

i think it might be move the decimal one place to the left
265 . 786 ÷ 10 = 26 . 5786 as you can see, the decimal point moved 1 place to the left. It was between 5 and 7 before, now it is between 6 and 5. facing the number, it moved 1 place to the left.
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