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3 years ago

Which a, b, and c values should be substituted into the quadratic formula for this equation? x2 - x 5 + 1 = 0

1 answer:

6 0

For A substitute it with 1 for x squared, because is has a coefficient of 1, -5 for B because the coefficient of -5x is -5, and 1 for C because there is no variable connected to is, and one is the coefficient.

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At best buy they have a 42" TV that sells for $1250 and is on sale 15% and sales tax is 6%.What is the final cost?

Marat540 [252]

Ok so
sale is 15% off
and add 6% tax

100-15=85
100+6=106

therefor
1250 with 15% discount plus 6% tax means
1250 times 85% times 106% =
1250 times 0.85 times 1.06=1126.25
final cost=$1126.25

4 0

3 years ago

Read 2 more answers

A small regional carrier accepted 21 reservations for a particular flight with 19 seats. 10 reservations went to regular custome

Viefleur [7K]

We have 19 available seats, and 21 reservations.

Of the 21 reservations, 10 are sure, so we have 10 out of the 19 seats that are surely occupied.

Then, we have 9 seats for 11 reservations, each one with 44% chance of being occupied.

We have to calculate the probability that the plane is overbooked. This means that more than 9 of the reservations arrive.

This can be modelled as a binomial distirbution with n = 11 and p = 0.44, representing the 44% chance.

Then, we have to calculate P(x > 9).

This can be calculated as:

$P(x>9)=P(x=10)+P(x=11)$

and each of the terms can be calculated as:

$\begin{gathered} P(x=10)=\dbinom{11}{10}\cdot0.44^{10}\cdot0.56^1=11\cdot0.0003\cdot0.56=0.0017 \\ P(x=11)=\dbinom{11}{11}\cdot0.44^{11}\cdot0.56^0=1\cdot0.0001\cdot1=0.0001 \end{gathered}$

Then:

$P(x>9)=P(x=10)+P(x=11)=0.0017+0.0001=0.0018$

We have a probability of 0.18% of being overbooked (P = 0.0018).

If we want to calculate the probability of having empty seats, we need to calculate P(x<9), meaning that less than 9 of the reservations arrive.

We can express this as:

$P(x$

We have to calculate P(x=9) as we already have calculated the other two terms:

$P(x=9)=\dbinom{11}{9}\cdot0.44^9\cdot0.56^2=55\cdot0.0006\cdot0.3136=0.0107$

Finally, we can calculate:

$\begin{gathered} P(x$

There is a probability of 0.9875 that there is one or more empty seats.

Answer:

There is a probability of 0.0018 of being overbooked.

There is a probability of 0.9875 of having at least one empty seat.

7 0

1 year ago

Answer these questions pls !

mihalych1998 [28]

Answer:

1. 105°

2. 75°

3.75°

4. 85°

Step-by-step explanation:

lmk if you need to show work

8 0

3 years ago

Please help me with these i need these done by tomorrow

timama [110]

I believe that the answer is 5.

6 0

3 years ago

Suppose angle A and angle B are supplementary.

lesantik [10]

Answer:

x = 2

Angle A = 95°

Angle B = 85°

Step-by-step explanation:

Concepts

Supplementary angles are angles that sum up to 180° to form a straight angle.

Application

We are asked to find the value of x, Angle A, and Angle B. We are given angles A and B as 15x + 65 and 50x - 15. To do this, we can set up the equation 15x + 65 + 50x - 15 = 180 because we know these angles are supplementary, or adding to 180°. Then, once we get the value of x, we plug in that value for each angle.

Solution

Step 1: Simplify both sides.