Ask question

Ask question

All categories

2 years ago

15

A plane pencil and a colored pencil together cost 30 cents The colored pencil cost 10 Cents more then the plane pencil how

much does each cost

1 answer:

Serjik [45]2 years ago

8 0

Answer: the plain pencil costs 10 cents and the colored pencil costs 20 cents

You might be interested in

What is 35 percent of 85??

oee [108]

35 percent of 85=29.75

5 0

3 years ago

Can someone tell me everything they know about Introducing Proportional Relationships?

Nookie1986 [14]

Answer:

1.Radius if half of diameter

2.If you want to get to circumference it diameter x 3.14

3.To find area of circle r x r x 3.14

4.From circumferenc to diameter it is circumfrence

divided by 3.14

4 0

3 years ago

the cost of running an appliance varies jointly as the number of watts used, the hours of operation, and the cost per kilo-watt

zhuklara [117]

Suppose:
C=cost
c=cost per kilo-watt hour
w=number of watts
h=number of hours
thus
C=kwhc
where:
k=constant of proportionality:
k=C/(whc)
but
C=15 when w=6000, h=10/60=1/6 hours, c=7.5 cents per kw/h
thus
k=15/(6000*1/6*7.5)
k=0.002
thus:
C=0.002(whc)
hence:
when
h=70*2=140=140/6=70/3 hours the cost will be:
C=0.002(6000*70/3*7.5)
C=2100 cents
C=$21

7 0

3 years ago

A bag contains 3 red marbles, 4 black marbles, and 5 yellow marbles. What are the chances of picking a marble that is not black?

lorasvet [3.4K]

I believe the answer is 8 out of 10

hope this helps!

8 0

2 years ago

Read 2 more answers

Substitute the given values into the formula, and solve for the unknown variable.

Alla [95]

Answer:

$h=\frac{1}{6}$

Step-by-step explanation:

Given:

$A=\frac{1}{2h} (B+b)\\$

$A=21, B=2, b=5 ,h= ?$

We have to find the value of 'h'

So, putting the given values in the equation to find the value of 'h'.

$A=\frac{1}{2h} (B+b)$

Implementing the given values in the given equations:

$21=\frac{1}{2h}(2+5)\\\\ 21=\frac{1}{2h} (7)\\\\\frac{1}{2h}=\frac{21}{7}\\\\ \frac{1}{2h}=3 \\\\h=\frac{1}{6}$

So, the value of 'h' is

$h=\frac{1}{6}$

3 0

2 years ago