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2 years ago

Which equation has roots -3 and 4

Mathematics

1 answer:

RSB [31]2 years ago

4 0

Answer:

x^2 - x - 12 (this is the second answer choice)

Step-by-step explanation:

Multiply (x + 3)(x - 4) and simplify the result:

x^2 - 4x + 3x - 12, or x^2 - x - 12 (this is the second answer choice)

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Correct answers only please!

blagie [28]

Answer: $86.25

Step-by-step explanation:

For this problem, we are given p, r, t.

p=70 (starting amount)

r=0.11 (11%)

t=2 (years)

We can plug this into the equation B=p(1+r)^t

B=70(1+0.11)^2

B=86.247

Sam would have $86.25

6 0

3 years ago

Read 2 more answers

On a map two cities are 6 3/4 inches apart. The scale of the map is 1/4 inch= 10 miles. What is the actual distance between the

Murljashka [212]

27 times 10 = 270 miles apart.

3 0

3 years ago

Suppose an airline accepted 12 reservations for a commuter plane with 10seats. They know that 7 reservations went to regular com

kvv77 [185]

Answer:

<h2>See the explanation.</h2>

Step-by-step explanation:

(a)

7 persons will show up for sure, hence there is not any kind of probability here.

The other 5 persons have 50% chance to show up.

The flight will be overbooked, if either 4 will come or 5 will come.

From the total 5 persons, 4 can be chosen in $^5C_4 = 5$ ways.

The probability that any four among the 5 will come is $5\times(\frac{50}{100} )^{5} = 5\times(\frac{1}{2} )^{5} = \frac{5}{32}$ .

The probability that all of the 5 passengers will come is $\frac{1}{32}$ .

Hence, the required probability is $\frac{5}{32} + \frac{1}{32} = \frac{6}{32} = \frac{3}{16}$ .

(b)

The probability that there will be exactly 10 passengers on the flight is $^5C_3\times (\frac{1}{2} )^5 = \frac{20}{2} \times\frac{1}{32} = \frac{10}{32} = \frac{5}{16}$ .

The probability that there will be no empty seats in the plane is $\frac{3}{16} + \frac{5}{16} = \frac{1}{2}$ .

Hence, probability of having empty seats is $1 - \frac{1}{2} = \frac{1}{2}$ .

6 0

3 years ago

I need help with these two questions<br><br>

Galina-37 [17]

Answer:

The first one: 19/15a

second one: b²-4ac = D

Step-by-step explanation:

for first one: take LCM and solve

for second one: you square the expression on both sides then b²= D + 4ac, then when you take 4ac to the left hand side, it becomes b²-4ac= D

6 0

2 years ago

NEED ANSWERS!!!

Finger [1]

Answer:

Will earn $74.38 in interest or for the total $924.38 for the total amount accrued, principal plus interest

Step-by-step explanation:

I = p x rt

I = 850 x 0.035 x 2.5 = 74.38 (interest)

P' = p + I = 850 + 74.38 = 924.38

3 0

3 years ago