All categories

3 years ago

Part A:

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

4 0

The correct answer is a. Please give me brainlest I hope this helps let me know if it’s correct or not okay

You might be interested in

The equation below expresses the approximate

natka813 [3]

Answer:

The ball will be the 7 ft high at 2 different times.

Step-by-step explanation:

The height in meters of the ball is given by the following equation:

$h(t) = -16t^2 + 25t$

7 feet high

The height, by the equation, is given in meters, so we have to work in meters. Since each feet has 0,3048 meters, 7 feet have have 2.1336 meters. So, we have to solve the following equation

$2,1336 = -16t^2 + 25t$

$16t^2 - 25t + 2,1336 = 0$

At how many different times will the ball be 7 ft. High?

We have to find the number of solutions for the equation above.

It is given according to the value of $\Delta = b^2 - 4ac$ . If it is positive, there are two solutions, zero one solution and negative no solutions.

In this equation $a = 16, b = -25, c = 2.1336$ . So

$\Delta = b^2 - 4ac = (-25)^2 - 4*16*2.1336 = 488$

Since the coefficient is positive, the ball will be the 7 ft high at 2 different times.

3 0

3 years ago

Please help Im giving 25 points

Alex787 [66]

It’s 5/7 5/8 I did the math

6 0

3 years ago

Read 2 more answers

In an 80/20 mortgage, what is the first mortgage used for?

ludmilkaskok [199]

Answer:

i think its letter B. 20% down payment

5 0

2 years ago

A student placement center has requests from five students for interviews regarding employment with a particular consulting firm

bagirrra123 [75]

Answer: a) 1 / 10

b) 3 / 10

c) 1 / 5

d) 3 / 5

Step-by-step explanation:

Total number of requests five students for interviews regarding employment with the consulting firm = 5

Number of students that are maths majors = 3

Probability of selecting a maths student is 3 / 5

Number of students that are statistics majors = 2

Probability of selecting a statistics student is 2 / 5

a) the probability that both selected students are statistics majors

= 2 / 5 × 1 / 4 = 2 / 20 = 1 / 10

b) the probability that both students are math majors

= 3 / 5 × 2 / 4 = 6 / 20 = 3 / 10

c) the probability that at least one of the students selected is a statistics major will be p( one statistics and the other, maths) + p( one maths and the other, statistic) - p( both are mathematics)

= (2 / 5 × 1 / 4 ) + ( 2 / 5 × 3 / 4 ) - (3 / 5 × 2 / 4)

= 2 / 10 + 6 / 20 - 6 / 20

= 1 / 5 + 3 / 10 - 3 / 10

= 1 / 5

d) the probability that the selected students have different majors is p(one is maths and the other is statistics) + p(one is statistics and the other is maths)

(3 / 5 × 2 / 4) + (2 /5 × 3 / 4)

= 6 / 20 + 6 / 20 = 12 / 20

= 3 / 5

3 0

4 years ago

The variables A, B, and C represent polynomials where A=x^2, B=3x+2, and C=x-3. What is AB-C^2 in simplest form?

yuradex [85]

Answer:

AB-C^2 = 3x^3 + x^2 + 9

Step-by-step explanation:

AB = (x^2)*(3x+2)= 3x^3 + 2x^2

C^2= (x-3)^2 = x^2 - 9

AB-C^2 = 3x^3 + 2x^2 - x^2 + 9 = 3x^3 + x^2 + 9

7 0

3 years ago

Read 2 more answers