All categories

3 years ago

Joann has a certain number of dimes and quarters in her purse, with a total value of $3.75. The

Mathematics

1 answer:

NISA [10]3 years ago

6 0

Answer:

The system of equations 10d+25q=375 and q = 3d-2 can be used to find the numbers of dimes and quarters that Joann has.

Step-by-step explanation:

Given that:

Total value of dimes and quarters = $3.75 = 3.75*100 = 375 cents

One quarter = 25 cents

One dime = 10 cents

Let,

d be the number of dimes

q be the number of quarters

According to given statement,

10d+25q=375

q = 3d-2

Hence,

The system of equations 10d+25q=375 and q = 3d-2 can be used to find the numbers of dimes and quarters that Joann has.

You might be interested in

Translate each inequality. ¨a minimum of 10¨

Alexandra [31]

Answer:

X ≥ 10

Step-by-step explanation:

5 0

2 years ago

Madelyn is knitting a scarf for a holiday gift. So far, it's 4.5 centimeters long. She plans to

olchik [2.2K]

In order to make the question true the length should be 45cm not 4.5 cm , Solving accordingly

Let nights be x
Rate of change=5cm

The equation is

y=45-5x

As 45 is base amount we used it as y intercect

7 0

2 years ago

Which is the function represented by the table? A 2-column table with 4 rows. Column 1 is labeled x with entries negative 2, neg

Serggg [28]

Answer:

$f(x)=4x$

Step-by-step explanation:

Given: See the attached image

To find: the function represented by the table

Solution:

A function is a relation in which every element of the domain has a unique image in the co-domain.

$f(-2)=-8=4(-2)\\f(-1)=-4=4(-1)\\f(0)=0=4(0)\\f(1)=4=4(1)$

Here, $-2,-1,0,1$ are elements in the domain and $-8,-4,0,4$ are elements in the co-domain.

Therefore, the table represents the function $f(x)=4x$

Download docx

7 0

3 years ago

A photocopier increased the sides of a square in the ratio 4:5.

Svetach [21]

Answer:

The sides are increased by a percentage of 25%

Step-by-step explanation:

Let

x -----> the length side of the original square

y ----> the length side of the increased square

we have

$\frac{x}{y} =\frac{4}{5}$

$y=\frac{5}{4}x$

$y=1.25x$

the increase is calculated by subtracting x from y

$y-x=1.25x-x=0.25x$

Remember that

$0.25=\frac{25}{100}=25\%$

therefore

The sides are increased by a percentage of 25%

4 0

3 years ago

What Is the width of 12 1/2 and 103 1/8

jolli1 [7]

Answer=8.25 or 8 1/4

Area=103 1/8
Length=12 1/2

Okay, so we know the Area and Length of a rectangle, and are just trying to solve for the width.

The formula for the area of a rectangle is:
Area=length*width

Now lets fill in the data that we know

103 1/8=12 1/2 * width
to get the width by itself, divide both sides by 12 1/2
8.25=width

Answer=8.25 or 8 1/4

8 0

3 years ago

Read 2 more answers