MATHEMATICS HIGH SCHOOL

Avery has a total of $12.50 in her piggy bank at home. Each week she takes out $1.25 to ride the city bus. Write an equation representing the balance, C, in the piggy bank, where w is the number of weeks.A) C = 1.25w – 12.50
B) C = 1.25w + 12.50
C) C = –1.25w + 12.50
D) C = –1.25w – 12.50

Answers

Answer 1

Answer:

For this case we have a function of the form:

$c (w) = mw + b$

Where,

b: initial amount
m: weekly rate of change
w: number of weeks
c: total balance

We have then that Avery has a total of $ 12.50 in her piggy bank at home:

$b = 12.50$

Each week she takes out $ 1.25 to ride the city bus:

$m = -1.25$

Substituting values we have:

$c (w) = - 1.25w + 12.50$

Answer:

an equation representing the balance, C, in the piggy bank, where w is the number of weeks is:

$c (w) = - 1.25w + 12.50$

Option C

Answer 2

Answer: amount now-bus=ballance
bus=number of weeks times how much taken out each time
12.5=amount now
bus=1.25w

C=12.50-1.25w
or
C=-1.25w+12.5

answer is C

Related Questions

I'm not really good at clearing fractions I need help with this problem please!
(4.3x10^8)x(2.0x10^6) how would you solve this and express it in scientific notation?
What is 1725 with a 15% markup
A fast food restaurant sells two sizes of fries, small and large. On friday they sold 81 fries total. If 9 of the fries were small, what is the ratio of large fries sold to small fries sold?
Which axis is triangle ABC reflected across?

Identify all of the expressions that simplify to −7/8.2 1/2 ÷ -7/20
______________

-1 2/5÷ -1 3/5
_____________
4 ÷ −4 4/7
_____________
−7/10 ÷ 4/5

Show your work pls

Answers

5/2 ÷ 7/10
5/2 x 10/7
50/14; 25/7; Answer: 3 4/7

-7/5 ÷ -8/5
-7/5 x 5/8
-35/40
-(-35/40)
-(-7/8). Answer: 7/8

-7/10 x 5/4
-35/40
-7/8. Answer: -7/8

Hoped this helped

What’s 9x38328292672

Answers

Answer:

344954634048

Step-by-step explanation:

Theres something called a caculator

Answer:

344954634048

Step-by-step explanation:

can i get brainliest

Could some one please help with question 9b and 11

Answers

9b. a^4 +2a^2-8=0
factorise
(a^2 + 4)(a^2 - 2)=0
we then get two answers from the brackets
a^2=-4
a= sqrt(-4) or 2j
and the second bracket gives us a^2=2
a= sqrt(2)

11. First expand the brackets.
Ax^3 + Bx^2 - x^2 + Bx +Cx + D
then equate the coefficients, this basically means put all the x^3, x^2 etc values together.
so Ax^3=3x^3 so we know that A=3Then put the x^2 together, so Bx^2-x^2=-x^2 and rearranging this gives B=0
Next we do Bx+Cx = 2x and we know that B is 0 so we can get rid of it and know that C = 2.
finally we can see that D = -7

A window shaped like a parallelogram has an area of 18 squareReet. The height of the window is 3 feet. How long is the base of
the window?

Answers

Answer:

Step-by-step explanation:

area of parallelogram = b times h

18/3 = 6 feet

. Allison drew a triangle with 2 congruent sides and 1 obtuse angle. Which terms accurately describe the triangle? Select all that apply.

Answers

Answer:

obtuse triangle

isosceles triangle

Step-by-step explanation:

A triangle is a three-sided polygon with three edges and three vertices. the sum of angles in a triangle is 180 degrees

Area of a triangle = 1/2 x base x height

the perimeter of a triangle = sum of the side lengths

An isosceles triangle has two opposite sides. If the two angles are equal , it means the triangle is an isosceles. Because 90 degrees is greater than 45 degrees, the two sides with the same length, would have a smaller length than the third side.

Answer:

obtuse triangle

isosceles triangle

Step-by-step explanation:

hope it helps

What is the sum of the given polynomials in standard form?
(x2 – 3x) + (–2x2 + 5x – 3)

Answers

Answer:

$-x^2+2x-3$

Step-by-step explanation:

We have $(x^2- 3x) + (-2x^2 + 5x -3)$ which is the same as:

$x^2-3x-2x^2+5x-3$

The polynomial has 5 terms that we are going to analyse:

1st. term: $x^2$ Degree: 2 Coefficient: 1

Observation: Coefficient is the number in front of a variable. In this case the variable is x. Then the first term has coefficient 1 because $(1).x^2=x^2$ .