MATHEMATICS HIGH SCHOOL

I need this rn 3×-7 equivalent expressions A. -21 B. 4 C. -4 D. 21

Answers

Answer 1
Answer:

Answer: The answer is A. -21

Its simplified and i just multiplied 3 by -7 :)
Answer 2
Answer:

Answer:

A

Step-by-step explanation:

because a plus and minus equals a minus.

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QuestionFind the product. Write your answer as a fraction in simplest form.
$-\frac{4}{9}\left(-\frac{7}{9}\right)=$

Answers

Answer:

  28/81

Step-by-step explanation:

As you know, the product of fractions is the product of their numerators, divided by the product of their denominators. As with any product, the sign will be positive if there are an even number of minus signs among the factors.

  (-4/9)(-7/9) = (4·7)/(9·9) = 28/81

A toy rocket was launched from the ground. The function f(x) = -16x2 + 160x shows the height of the rocket f(x), in feet, from the ground at time x seconds.What is the axis of symmetry of the graph of f(x), and what does it represent?

These are the choices:
x = 10; it takes 10 seconds to reach the maximum height and 10 seconds to fall back to the ground
x = 10; it takes 10 seconds to reach the maximum height and 20 seconds to fall back to the ground
x = 5; it takes 5 seconds to reach the maximum height and 10 seconds to fall back to the ground
x = 5; it takes 5 seconds to reach the maximum height and 5 seconds to fall back to the ground

Answers

Hello,

Answer D
Vertex of y=-16(x-5)²+400  is (5,400)

you have a 1.5 litre bottle of water and drink 295 millilitres and your friend drinks 135 millilitres, how much water is left

Answers

1,070 milliliters of water is left

THE VOLLEYBALL TEAM WON 80% OF THE GAMES THEY PLAYED THIS SEASON. THETEAMPLAYED A TOTAL OF 25 GAMES. how many games the volleyball team won

Answers

Answer:

20 games won

Step-by-step explanation:

duh

Find the area of the regular polygon. Give the answer to the nearest tenth.pentagon with a side of 6 m (1 point)
A. 123.9 m²
B. 12.4 m²
C. 61.9 m²
D. 49.5 m²

Answers

The area of the regular pentagon:A=5* (s*a)/(2) where s=6m, and a=3*tg 54°= 3*1.37=4.13 m
Explanation: 54° is a half of the inner angle of the pentagon. The interior angles of a pentagon add up to 540°. Each angle is 108°.
Finally: A=5* (6*4.13)/(2)=61.93 m².
Answer: C) 61.9 m²

Answer:

61.9

Step-by-step explanation:

center center is 72 degree for each triangle

the distance of center to the side h=3/tan 36=4.12,

area=5* (4.12*6)/2=61.94==61.9

A spinner is numbered from 1 through 10 with each number equally likely to occur. what is the probability of obtaining a number less than 2 or greater than 7 in a single spin?

Answers

There are 10 numbers from 1 - 10
first we get the numbers less than 2 are (1)
secondly get the numbers greater than 7 are (8,9,10)
total = 4 numbers
The favorable probability is 4 / 10=2 / 5
hope it helps

Answer:

(2)/(5)


Step-by-step explanation:


There are 10 total outcomes [numbers from 1 to 10]

What are the numbers that are LESS THAN 2 or GREATER THAN 7?

They are 1, 8, 9, and 10.


That's a total of 4 numbers. Also, total numbers is 10. Hence the probability of obtaining numbers that are less than 2 or greater than 7 is:

(4)/(10)

Simplifying gives us a probability of  (4)/(10)=(2)/(5)
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