MATHEMATICS MIDDLE SCHOOL

At the beginning of the fall, the water level of a lake is 7 feet below normal level. After a drought, the lake's water level dropped 2 1/3 feet. Where is the lake's current water level in relation to its normal water level?

Answers

Answer 1
Answer:

Answer:

1:3

Step-by-step explanation:

2 1/3*3=7

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A triangle has an angle that measures 80°. The other two angles are in a ratio of 7:13. What are the measures of those two angles?

Answers

You can make a system of equation using the fact that all angles in a triangle need to add up to 180 and that 7:13 can be thought of as 7/13.
lets make one angle a and the other angle b.

a+b=100  (a+b+80=180)
a÷b=7/13

You can solve for a in the second equation to get a=7b/13 and then you can substitute that in for a in the first equation to get (7b/13)+b=100 and then solve for b as follows.
(7/13)b+b=100
b(7/13+1)=100
b(20/13)=100
b=65
You can then solve for a in from plugging in b to the first equation to get a=35.
Therefore the 2 other angles are 35° and 65°. 

You can prove this by showing that 35+65+80=180 and that 35/65=7/13.

I hope this helps.  Let me know in the comments if anything is unclear.

Suppose that the population of deer in the state is 19,900 and is growing 3% each year. Predict the population after 10 years.

Answers

19900 x .03 = 597
597 x 10 = 5970
5970 + 19900 = 25870

Answer:

About 26,744 deer.

Step-by-step explanation:

P(10) = 19,900 (1.03)10 ≅ 26,744

The equation Y= 1.9X can be used to determine the total weight in pounds, y, of the number of paperback books in the first printing of Zamir's novel, x. The equation was used to fill in the table below. Weight of Books Total Weight (in pounds) 1 90 Number of Books 100 150 200 250 380 4 What value is missing from the table?​

Answers

Answer:

i am positive it is 280

Step-by-step explanation:

because if you subtract 475 from 380 you get 90

and then you can add 90 to 190 to get the unknown number

hopefully this helped :)

Answer:

i did the math but what i got was 190 and i am sure it isnt the answer

Step-by-step explanation:

Show work for .77÷136.9

Answers

77 divide 139.9 = 0.56245434623

I would like to know if 200 cm is greater or less than 3 m

Answers

100 cm = 1 m
200 cm = 2 m
200 cm < 3 m

What fraction is not greater than 1/2

Answers

Fraction not greater than 1/2 are: (2)/(5) , \; (11)/(25) \;, (3)/(10) \;, (1)/(5) \;,(1)/(10)\;,(6)/(25) \; and\; so\; on.

What is fraction?

A fraction defined as the part of the whole thing.

There can be many fractions not  greater than 1/2

Let us take,

1/2=0.5

If we take numbers less than 0.5 ,there are

0.4,0.44,0.3,0.2,0.1,0.24,0.46,0.36 and so on

If we convert all of them into fraction then,

(2)/(5) , \; (11)/(25) \;, (3)/(10) \;, (1)/(5) \;,(1)/(10)\;,(6)/(25) \; and\; so\; on

Like this we can find many fraction less than 1/2

Learn more about fraction here:

brainly.com/question/10354322

#SPJ1
1/3 1/4 1/5 1/6 1/7 1/8 1/9 1/10 And so on.. Hope this helped!
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