15a2-6ab-8a2 - 5ab + 20+ a? - ab

Change -1.75 to degree measure & round to the nearest tenth

Dima020 [189]

Answer:

I believe the answer is D-100.3 degrees, however, I'm not 100% sure.

Step-by-step explanation:

3 0

3 years ago

10. A movie theater advertises that a family of two adults, one student, and one child between the ages of 3

BlackZzzverrR [31]

Answer:

Students ticket = $4

Child ticket = $1

Adult ticket = $5

Step-by-step explanation:

Let the price of the student ticket be $x and the price of a child ticket be $y. An adult ticket costs as much as the combined cost of a student ticket and a child ticket, so the price of one adult ticket is $(x+y).

1. A movie theater advertises that a family of two adults, one student, and one child between the ages of 3 and 8 can attend a movie for $15. Then

$2(x+y)+x+y=15$

2. If you purchase 1 adult ticket, 4 student tickets, and 2 child tickets for $23, then

$(x+y)+4x+2y=23$

Now, solve the system of two equations:

$\left\{\begin{array}{l}2(x+y)+x+y=15\\ \\(x+y)+4x+2y=23\end{array}\right.\Rightarrow \left\{\begin{array}{l}3(x+y)=15\\ \\5x+3y=23\end{array}\right.\\ \\\left\{\begin{array}{l}x+y=5\\ \\5x+3y=23\end{array}\right.\\ \\\left\{\begin{array}{l}y=5-x\\ \\5x+3(5-x)=23\end{array}\right.$

Solve the last equation

$5x+15-3x=23\\ \\2x=23-15\\ \\2x=8\\ \\x=4\\ \\y=5-x=5-4=1$

Students ticket = $4

Child ticket = $1

Adult ticket = $5

8 0

3 years ago

Read 2 more answers

*in a science experiment, farah mixed a salt solution and vinegar in the ratio 3 : 7. a. if she used 262.8 milliliters of salt s

Basile [38]

n a science experiment, farah mixed a salt solution and vinegar in the ratio 3 : 7.

A.) if she used 262.8 milliliters of salt solution, the amount of vinegar is equal to:

X = 262.8 ml ( 7 ml vinegar/ 3 ml salt soln)

X = 613.2 ml vinergar

B.) y = 0.56 L vinegar ( 3 L salt soln/ 7 L vinegar)

Y = 0.24 L salt soln

7 0

3 years ago

18........................

Alex787 [66]

Answer:

D

Step-by-step explanation:

We will use the radical property $\sqrt{a*b} =\sqrt{a} \sqrt{b}$ to simplify this.

The problem is $\sqrt{169*x^5}$

We can simplify this as:

$\sqrt{169*x^5} \\=\sqrt{169} \sqrt{x^5}$

Now we can use the property of radicals, $\sqrt[n]{x^a} =x^{\frac{a}{n}}$ , to write as:

$\sqrt{169} \sqrt{x^5} \\13*x^{\frac{5}{2}}$

D is right answer.

4 0

3 years ago

Read 2 more answers

A bag contains 8 red balls and 3 white balls. Two balls are drawn without replacement. (Enter your probabilities as fractions.)

Nadusha1986 [10]

Answer:

12/55

Step-by-step explanation:

Probability is the ratio of the number of possible outcomes to the number of total outcomes.

Given that the bag contains 8 red balls and 3 white balls, the probability of picking a red ball

p(r) = 8/(8+3) = 8/11

Probability of picking a white ball

= 3/11

when a red ball is picked first, the total number of balls reduces to 10 hence the probability that the second ball is white, given that the first ball is red

=8/11 * 3/10

= 24/110

= 12/55

4 0

3 years ago

15a2-6ab-8a2 - 5ab + 20+ a? - ab - 31 -