Help me please! I don't know where to start!

Answers

Answer 1

Answer: week 4 = 8miles
week 16 = 26 miles
constant increase
16 - 4 = 12 weeks
26 - 8 = 18 miles
so...
in 12 weeks she increased 18 miles
12x=18
x= 18/12
x=1.5 per week

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Solve for x and y simultaneously 2 x + y =5 and 4 x + 3y =9
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Round off 3.55 to one significant figure

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Well I Think it is 4 because it says round off

Please help with number 24 !!

Answers

The answer is F. y=2.5x. This is because if you multiply each pound (x) from the table by 2.5, you will get the cost (y). Hope this helps!

If y varies directly with respect to x, then
y = k*x
Solving for k, we get
k = y/x

Pick any column of (x,y) values and plug it into the equation
I'm going to pick (x,y) = (4,10)
k = y/x
k = 10/4
k = 5/2
k = 2.5

So the equation is y = 2.5*x or simply y = 2.5x
Answer is choice F

Simplify -62 ÷ 12 - 2(-7).

-17
35
11
-35

Answers

I don't know if you know something called PEMDAS

Parentheses
Exponent
Multiply
Divide
Add
Subtract

So you would do the -2(-7) first giving you 14

So now we have -62/12 +14

now you would do -62/12 giving you -5.16666667

and now the equation is -5.16666667 + 14 = 8.83333333

I know for a fact, being in Calculus Honors, that what I did to simplify is correct. Using the Order of Operations, or PEMDAS (Commonly remebered as "Please Excuse My Dear Aunt Sally". It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction".) to simplify this answer is necessary.

If your teacher wrote this problem please inform him or her of Order of Operations before your classmates use it even though its wrong.

the length of a tennis court is 78 feet. this is 3 less than 3 times the width of the court. what is the width of the court

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$length:l=78ft.\n\nw-width\n\nl=3w+3\n\n3w+3=78\ \ \ \ /-3\n\n3w=75\ \ \ \ /:3\n\nw=25\ (ft.)\leftarrow answer$

the perimiter of a parallelogram is 72 meters the width of the paralleogram is 4 meters less than its length. find the length and width of the parallelogram.

Answers

Answer:

length = 20 m

width = 16m

Step-by-step explanation:

The answer to this would be
Length 20
Width 15

Solve the following simultaneous equations : 5m - 3n = 19; m - 6 = -7

Answers

Answer:

m = -1

n= -8

Step-by-step explanation:

5m -3n = 19

m - 6 = -7

solve for m:

m = -7+6

m = -1

plug in m

5(-1) - 3n = 19

-5 - 3n = 19

-3n = 24

n = -8

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