MATHEMATICS HIGH SCHOOL

If f(x) = x2 + 2x – 10, what is f(-2)?

Answers

Answer 1
Answer:

Answer:

-10

Step-by-step explanation:

simply plug -2 into the function and you get 4 + 2(-2)-10, which gets you 4+ (-4) -10= 4-4-10= -10
Answer 2
Answer:

Answer: -18

Step-by-step explanation:

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Lea and Marie are washing all the windows in their house. It would take Lea 80 minutes to wash the windows by herself, and it would take Marie 60 minutes to wash them by herself. Lea creates a table so she can find out how long it will take to wash the windows if they work together. What is the missing value in the table that represents the rate for Marie?

Answers

The missing value that represents the rate for Marie is 1/60. As mentioned in the table, rate (r) is the part (p) per minute (t). Let's check if it works for Lea. If p = 1/80t, then r = (1/80t)/t = 1/80 * t/t = 1/80 * 1 = 1/80. So, the formula works. Now, calculate the rate for Marie. If p = 1/60t, then r = (1/60t)/t = 1/60 * t/t = 1/60 * 1 = 1/60

Answer:

it would be d 60t

Step-by-step explanation:

Lea and Marie are washing all the windows in their house. It would take Lea 80 minutes to wash the windows by herself, and it would take Marie 60 minutes to wash them by herself. Lea creates a table so she can find out how long it will take to wash the windows if they work together. What is the missing value in the table that represents the rate for Marie?

A table showing Rate in part per minute, Time in minutes, and Part of Windows Washed. The first row shows Lea, and has StartFraction 1 Over 80 EndFraction, t, and StartFraction 1 Over 80 EndFraction t. The second row shows Marie, question mark, t, and StartFraction 1 Over 60 EndFraction t.

so if she and her friend would be washing all of the windows in their house then their house is 60 cm and 60 in so the answer would be 60t

Is (-2) to the 27th power positive or negative and how would you know?

Answers

Answer:

It would be negative because multiplying a negative by a positive gives you a negative.

Andrew borrows $79,500 for 5 months on 6.30% interest rate in his saving account. calculate the simple interest

Answers

Equation i= p time r time T 79500 time .0630 time .42 Equal 21,035.7 simple interest Dos Doctor pepper on the interest, going back two time on the left which would become .0630 5 divide month of 12 which is .41666 Round to the nearest tenth which is .42

Final answer:

The simple interest on a $79,500 loan borrowed for 5 months at a 6.30% interest rate is $25,087.50.

Explanation:

To calculate the simple interest, we can use the formula: Simple Interest = Principal Amount * Rate * Time. In this case, the principal amount is $79,500, the rate is 6.30%, and the time is 5 months. First, convert the rate to a decimal by dividing it by 100: 6.30/100 = 0.063. Then, substitute the values into the formula: Simple Interest = $79,500 * 0.063 * 5 = $25,087.50.

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Identify which table shows a direct variation.A.
Table 1 only







B.
Table 2 only







C.
both tables







D. neither table

Answers

the answer is A. Table 1 only the second table should be going by 9.6 but it isn't.

Which expression is equivalent to (tangent (StartFraction theta Over 2 EndFraction) ) (negative sine theta)?– 1 – cos(ϴ)
– 1 + cos(ϴ)
1 + cos(ϴ)
1 – cos(ϴ)

Answers

The given expression is equivalent to (-1 + cosθ). Option B is correct.

What is trigonometry?

The field of mathematics is concerned with the relationships between triangles' sides and angles, as well as the related functions of any angle.

The given data in the problem is;

\rightarrow \rm (tan((\theta)/(2) )(-5sin\theta)\n\n \rightarrow (sin (\theta)/(2) )/(cos (\theta)/(2)) * - (2 sin n (\theta)/(2) * {cos (\theta)/(2))

\rightarrow - (2 sin ^2 (\theta)/(2))\n\n -1+cos \theta

The given expression is equivalent to (-1 + cosθ).

Hence,option B is correct.

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Suppose a triangle has sides a, b, and c let theta be the angle opposite the side of length a. If cos theta < 0 what must be true? a- b^2+c^2>a^2
b- a^2+b^2=c^2
c- b^2+c^2 d- a^2+b^2>c^2

Answers

Suppose a triangle has sides a, b, and c let theta be the angle opposite the side of length a. If cos theta < 0 The statement that is true is b^2+c^2>a^2. The answer is letter A.

b^2+c^2<a^2 just took test

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