Mathematics Middle School

The depth y (in inches) of a lake after x years is represented by the equation y=0.2x+42. How much does the depth of the lake increase in four years?

Answers

Answer 1
42.8 in
Step-by-step explanation:
Step one:
given data
we are told that the expression for the depth of a lake after x years is given by

Required
The value of y when x= 4
Step two:
substitute the value of x in the expression to get y

After 4 years the depth will increase by 42.8 in

Related Questions

given a set of integers, does any non-empty subset of them add up to zero? That is a decision problem and happens to be NP-complete?

Answers

no because the subset sum problem is a decision problem in computer science. In its most general formulation, there is a multiset S of integers and a target sum T, and the question is to decide whether any subset of the integers sum to precisely. the problem is known to be NP-complete. moreover, some restricted variants of it are NP-complete too, for example.

HeLlO I nEED aN ANsSWER aSap

Answers

Answer:

2 over 3 tablespoon of vinegar is mixed with every tablespoon of olive oil because the ratio of vinegar to olive oil is 2:3.

Step-by-step explanation:

someone plz help im giving out brainliest ;)

Answers

Answer: the slope means the triangle have a side length of 3 and the slope means that the equilateral triangle have a perimeter of 0.

Step-by-step explanation:

Hope this helps ;)

There were 350 members in the high
school marching band last year. This year,
the number of marching band members
increased by 56. By what percentage did
the number of marching band members
increase? (7.1A, 713, 7.1F)
A 84%
B 6%
C 16%
D 19%

Answers

Answer:

the answer is c

Step-by-step explanation:

you find what percent 56 is of 350

C. 16%
56/350 = 0.16
= 16%

Liam is setting up folding chairs for a meeting. If he arranges the chairs in 7 rows of the same length, he has 5 chairs left over. If he arranges the chairs in 5 rows of that same length, he has 15 left over. How many chairs does Liam have?

Answers

Answer:

Yoi should be writing in explaination:  

Step-by-step explanation:

Write the equation for first arrangement

Write the equation for second arrangement

Write an equation that can be solved to find the number of chairs in a row for which the total number of chairs is same

The answer would be 3

Use the distributive property to simplify 5(w + 6) =

Answers

Answer:

5w+30

5(w+6)=

5*w= 5w

5*6= 30

Answer:

[tex]\huge\boxed{\boxed{5w+30}}[/tex]

Step-by-step explanation:

Hello.

The Distributive property states that

a(b+c)=ab+ac

Let's use this property to simplify:

5(w+6)

5w+30 (5 times w and 5 times 6)

And we're done!

I hope it helps & have an outstanding day!

~ST2710 :)

Please help 4 questions for 10 points!!!
------------------------------------------------------------
1) Which expression is equivalent to 4(23)?
4(20+3)

4(2+3)

4(2+13)

4(20+30)
..................................................................................................
2. Which expressions are equivalent to 4(42)?
Select each correct answer.
4(20+22)

4(40+2)

4(4+20)

4(4+2)
.......................................................................................................
3.Which expression shows how 6⋅45 can be rewritten using the distributive property?
6⋅40+6

20⋅6+20⋅5

6⋅40+6⋅5

6⋅4+6⋅5
...............................................................................
4.Tori uses the greatest common factor and the distributive property to rewrite this sum:
24 + 84
What expression does Tori write?
​2(24+42)​

​12(2+7)​

​24(1+4)​

​4(6+21)
.....................................................................
my last one got deleted....

Answers

Answer:

Step-by-step explanation:

1)4(20+3)

2)4(20+22)

3)6.40+6.5

4)12(2+7)

I agree with the person above

Which statement compares the two numbers correctly?

0.799 ________ 0.8

0.799 > 0.8
0.799 = 0.8
0.799 < 0.8
0.8 < 0.799

Answers

Step-by-step explanation:

Option 3 is correct..........

i dont know 4, 5, and 6
Help plz :]

Answers

What he said seems abt right

Which equation is an example of slope-intercept form of a line?

Answers

Slope intercept form is y=mx+b

The answer is option B.

HHHHHHHHHHHHHHHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPPPP PLEASE

Answers

Answer: We need to see the graph to add an good answer

Choices are:
A + 95

B -95

C +8

D -8

Answers

Answer:

A. +95

Step-by-step explanation:

Above = positiveSo, 95 feet above sea level = +95Therefore, A is the correct option

I hope this helps!

the answer is A .....

4 times a number minus 3 is 9. What is the number?

Answers

4x3=12-3=9

brainliest pls

4x3 would equal 12 and if you subtract 3 it is 9 So your answer is 9

can anyone help?! im stuck on this question...

Answers

They have 12 games left

A jacket is marked down 55% off the original price. If the original price was $160.00, what is the sale price of the jacket before sales tax?

Answers

Answer:

72

Step-by-step explanation:

because when you do 55% out of 160 it will give you 88 which you subtract from 160 and then you will end up with 72

72 + (13- 4) + 5 x 23
72 +
+5x2²
72 + 9 +5 %
+ 5 X 8
8+

Answers

Answer:

196

Step-by-step explanation:

do parantheses first, then multiplication add the answer from parantheses and multiplication and lastly add 72

What is one constant of proportionality for this situation? *

Answers

Answer:

The constant of proportionality is the ratio between two directly proportional quantities. In our tomato example, that ratio is $3.00/2, which equals $1.50. Two quantities are directly proportional when they increase and decrease at the same rate.

Step-by-step explanation:

Describe the graph of the equation y = 0. Is the equation a function?


A. horizontal line; no

B. horizontal line; yes

C. vertical line; no

D. vertical line; yes

Answers

Answer:

D

Step-by-step explanation:

QUICK!! TEN POINTS!! BRAINLIEST FOR WHOEVER GETS IT RIGHT!!


What are the coordinates of point S?

(-3/41/2)

(-1/2,3/4)

(1/2,3/4)

(3/4,1/2)

Answers

D...................
(-3/4, 1/2). You are going to the left(negative) 3/4 and up(positive) 1/2

Please find the value of z.
A. 50 degrees
B. 90 degrees
C. 45 degrees
D. 75 degrees

Answers

Answer:

45° is the value of z in whatever that is

Answer:

its 45 degrees

Step-by-step explanation:

i don't know what shape that is but the answer is 45 degrees

4,902 × 0.001 is the same as 4,902 ÷ 103
True or False?

Answers

Answer:

False

Step-by-step explanation:

4902 times .001 is 4.902 and 4902 divided by 103 is 18.466

False they won’t get the same product

4.
Given a rectangle with dimensions 5 cm and 10 cm, as shown, find the length of the diagonal, if possible.
5 cm
10 cm
help.

Answers

Length = 8 cm

Width = 6 cm

hope that helps

ok this seems a bit hard
can you do this!? :/

Answers

Answer:

(3j⁴k⁸)⁸ = 6561 j³²k⁶⁴

Step-by-step explanation:

3⁸ = 3*3*3*3*3*3*3*3

j⁴=j*j*j*j

(j⁴)⁸ = (j*j*j*j)*(j*j*j*j)*(j*j*j*j)*(j*j*j*j)*(j*j*j*j)*(j*j*j*j)*(j*j*j*j)*(j*j*j*j) = j⁴ˣ⁸ = j³²

.......

(3j⁴k⁸)⁸ = 6561 j³²k⁶⁴

solve for z: -21 = z - (-6 - 2z)

Answers

Answer:

z = -9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Algebra I

Terms/Coefficients/Degrees

Step-by-step explanation:

Step 1: Define

-21 = z - (-6 - 2z)

Step 2: Solve for z

Distribute negative:                      -21 = z + 6 + 2zCombine like terms:                     -21 = 3z + 6Isolate z term:                               -27 = 3zIsolate z:                                        -9 = zRewrite:                                         z = -9

Answer:

Step-by-step explanation

-21-6=2z+z

Or,-27=3z

Or,z=-9

Evaluate the expression. [2.1 + (9.2 x 3.3)] x 0.8

Answers

Answer:

Step-by-step explanation: 1.68x + 24.288x²

Find the least common multiple (LCM) of 21 and 6.

Answers

42 is the LCM of 21 and 6

Answer:

42

Step-by-step explanation:

Which ordered pair is not a point on the graph of y = 1/2 x - 7?
A. (1, -6 1/2) B. (-2, -8) C. (0, -7) D. (2, 8)

Answers

the answer is a, brainliest?
The answer is C.(0,-7)

Help please answer both tysvm!!!!

Answers

Answer:

A-1500

B- 75

C- 975 divided by 75= a

D- 7

Step-by-step explanation:

A equals 15000
b equals 700

HELPPPPPPPP ijendhebfuhrbfrefernf

Answers

Answer:

መልሱ 78 ይሆናል ግን የጎደለው መላምት ፍጥነት ነው

Step-by-step explanation:

I really need an answer its multiple choice

Answers

Answer:

a

Step-by-step explanation:

just plug in

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