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3 years ago

Indigo finds some dimes and quarters in her piggy bank. How much money in

Mathematics

1 answer:

sdas [7]3 years ago

8 0

Answer:

1) $2.45

2) $(0.25y + 0.1z)

Step-by-step explanation:

dimes are 0.10 in value, quarters are 0.25

1) How much money in dollars does she have if she has 12 dimes and 5 quarters? 12(0.1) + 5(0.25) = 1.2 + 1.25 = $2.45

2) How much money in dollars does she have if she has z dimes and y quarters?

z(0.10) + y(0.25)= 0.25y + 0.1z

I rearranged it because we put variables in alphabetical order.

LMK if you have questions.

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Kira made 208 dollars for 13 hours of work at the same rate how many hours would she have to work to make 176 dollars?

Irina-Kira [14]

208 ÷ 13 = 16, so her rate is $16 per hour. Through guess and check,

Kira would have to work 11 hours to make $176.

6 0

4 years ago

Read 2 more answers

Jackie bougth red and green binders and paid $2.25 for each red binder and $3.24 for each green binder and spent a total of $21.

Alenkasestr [34]

Answer:

4 each of red and green binders.

Step-by-step explanation:

Given: Price of each red binder is $2.25.

Price of each green binder is $3.24.

Total Jackie paid is $21.96.

Lets assume the number of red binder bought be "x".

∴ Total amount paid for red binder= $number\ of\ red\ binder \times price\ for\ each\ red\ binder$

⇒ Total amount paid for red binder= $x\times \$ 2.25= \$ 2.25x$

Now, finding the amount paid for green binder.

As we know the total amount paid by Jackie is $21.96 and she bought same number for each binder.

Jackie paid for x number of green binder= $\$ 3.24\times x= \$ 3.24x$

Next, we can write an equation on total amount paid for Green binder to find value of x.

∴ $\$ 21.96-\$ 2.25x= \$ 3.24x$

Solving the equation.

$\$ 21.96-\$ 2.25x= \$ 3.24x$

Adding both side by \$ 2.25x

⇒ $\$ 21.96= \$ 3.24x+\$ 2.25x$

⇒ $\$ 5.49x = \$ 21.96$

cross multiplying both side.

⇒ $x= \frac{21.96}{5.49} = 4$

∴ x= 4

Hence, Jackie bought 4 each of red and green binders as she bought same number of each binders.

7 0

3 years ago

Grace is comparing cell phone plans. A prepaid phone plan costs $0.20 per minute and has no monthly fee. A contracted phone plan

katen-ka-za [31]

Answer:

The prepaid phone plan will have a steeper line and lower y-intercept.

Step-by-step explanation:

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3 years ago

Read 2 more answers

Which of the following equations has positive slope and a negative y-intercept?

blsea [12.9K]

C) y= 7.5x-2

7.5 is a positive slope, and -2 will be your negative y intercept

y=mx+b

Remember m always means slope and b is always the y intercept!

5 0

3 years ago

Solve the system by graphing.

igor_vitrenko [27]

Answer:

Hi There the correct answer is {x,y} = {-1,-10}

System of Linear Equations entered :

[1] 3x - y = 7

[2] 4x - 2y = 16

Graphic Representation of the Equations :

y + 3x = 7 -2y + 4x = 16

Solve by Substitution :

// Solve equation [1] for the variable y

[1] y = 3x - 7

// Plug this in for variable y in equation [2]

[2] 4x - 2•(3x-7) = 16

[2] -2x = 2

// Solve equation [2] for the variable x

[2] 2x = - 2

[2] x = - 1

// By now we know this much :

x = -1

y = 3x-7

// Use the x value to solve for y

y = 3(-1)-7 = -10

Solution :

{x,y} = {-1,-10}

Hope it helps!

8 0

3 years ago