MATHEMATICS HIGH SCHOOL

A-b=4 and a+b=6 find a²+b² and ab

Answers

Answer 1
Answer:

Answer:

...a-b=4

a+b=6

→2a=10

→a=10/2 =5

we calculate b:

a-b=4

5-b=4

-b=4-5

b=1

→a=5;  b=1

a²+b² = 5²+1² = 25+1 = 26

ab =5*1 = 5

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Jenny rented a bike from Danielle's Bikes.It cost $13 plus $3 per hour. If Jenny paid
$34, then she rented the bike for how
many hours?

Answers

The answer is 7 cuz 34-13=21/3=7

Answer:

7 hours

Step-by-step explanation:

34 minus 13, the original price to buy the bike. That equals 21, 21 divided by 3, equals 7, because every hour, 3 dollars is spent.

If the ratio of men to women in a movie theater is 1.00 when written as a decimal, what must be true?

Answers

what must be true? answer is The ratio of women to men in the theater is 0.50 and this because it would be Number of Men is 1 = Number of Women = 1. Total people = 2. Ratio of women to total = 1

Answer:it’s actually ratio of women to total people in the theater is 0.50

Step-by-step explanation:

A ratio of 1.00 for men to Women indicates that the number of men is equal to the number of women. In other words half of the people in the theater are men and the other half or women. Therefore, the ratio of women to total people must be 1/2 = 0.50

Find the measure of each interior angle of a regular decagon.The measure of each interior angle is
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Answers

Answer:

The measure of each interior angle is 144°

Step-by-step explanation:

It costs $100 to rent the bowling alley, plus $4 per person. The cost for any number (n) of people can be found using the expression 100 + 4n. The cost for 15 people equals _______ PLEASE ANSWER!!!

Answers

100 + 4n = $$$
100 + 4x15 = $$$
100 + 60 = $$$
= $160

Hope I helped! Tell me if you need further explanation.
100+4(n)
n = 15 
100+4(15)
100+60 = 160
$160 = total price of bowling alley + the 15 people

GEOMETRY. PLEASE CHECK MY ANSWER! THANKS.Mario’s company makes unusually shaped imitation gemstones. One gemstone had 12 faces and 10 vertices. How many edges did the gemstone have?

A. 23 edges
B. 22 edges
C. 25 edges
D. 20 edges****

Answers

I'd solved it in the pic, and the answer is D. 20
This is simple.
we should have a knowledge of the Euler's Theorem/Euler's Formula
F+V=E+2
Basically states that:
# of Faces+ # of Vertices= # of Edges+2
12 + 10 = E + 2
(-2) + 22 = E + 2 (-2)
           20 = E

Yep, The answer is D. 20 edges

5 over 8 divided by 3 over 10 in simplest form

Answers

I'm assuming you're referring to fractions.

First, invert the 3/10. 
3/10 = 10/3

Then multiply.

5/8 • 10/3 = 50/24
50/24 = 25/12

5/8 ÷ 3/10 = 25/12
5/8 / 3/10 =
5/8 x 10/3=
50/24=
25/12
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