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3 years ago

Sophie has $4.20 worth of dimes and quarters. She has twice as many quarters as

Mathematics

2 answers:

ikadub [295]3 years ago

7 0

Answer:

Step-by-step explanation:

Gwar [14]3 years ago

4 0

Answer:

q=amount of quarters

d=amount of dimes

0.10d+0.25q=4.20

2d=q

comment "egg" if you're coming here from DeltaMath

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A 1970 comic book has appreciated 7% per year and originally sold for $0.35. What will the comic book be worth in 2017?

omeli [17]

You tell me if this makes sense to you.

It's 47 years from 1970 to 2017 so you would need to multiply 7% by the 47 years.

So: 0.07x47= 3.29

Now you should add your new price to your original price: $3.29+$0.35= 3.64

So it should cost $3.64 now. Yes that does seem kind of low but that's how you do it.

I hope this helps :)

6 0

3 years ago

Write each of the following expressions without using absolute value: |z−6|−|z−5|, if z<5

abruzzese [7]

Answer:

The answer is <em>1</em>.

Step-by-step explanation:

Given the expression:

$|z-6|-|z-5|,\ if\ z$

To find:

The expression without absolute value.

Solution:

First of all, let us learn about the absolute value function:

$y = f(x) = |x| =\left \{ {{x\ if\ x>0} \atop {-x\ if\ x$

i.e. value is x if x is positive

value is -x if x is negative

Here the given expression contains two absolute value functions:

$|z-6|$ and $|z-5|$

Using the definition of absolute value function as per above definition.

$|z-5| =\left \{ {{(z-5)\ if\ z>5} \atop {-(z-5)\ if\ z$

$|z-6| =\left \{ {{(z-6)\ if\ z>6} \atop {-(z-6)\ if\ z$

Now, it is given that z < 5 that means z will also be lesser than 6 i.e. z < 6

So, given expression $|z-6|-|z-5|,\ if\ z$ will be equivalent to :

$-(z-6) - (-(z-5))\\\Rightarrow -z+6 +z-5 = \bold{1}$

So, the expression is equivalent to <em>1</em>.

6 0

3 years ago

A lap around Natalie's neighbourhood is 20 kilometres. Natalie ran 2 laps before

Fynjy0 [20]

I would say about 40 kilometers it’s ifs 20 around her neighborhood that 20+20=40 and walking tha rest made the question easier but yea 40

8 0

3 years ago

Select the correct answer from each drop-down menu.

Elodia [21]

Answer:

The left end approaches to + Infinite being an exponential function, and the right end to 0

Step-by-step explanation:

we have to remember the exponential function, the best way to find the answer is plotting the graph or arranging a table of values.

As you can see in the attached graph the y axis gets closer and closer to 0 as it moves forward in the x axis, and as it moves to the left the y axis starts increasing rapidly.

Also you got to keep in mind the way that functions behave in terms of the sign of its variable. for example the 10 in this equation only makes the curve to get wider, but if you change the sign to minus, the answer would be different.

8 0

3 years ago

Pls need help, will give brianlist

Firdavs [7]

Answer:

1) Your slope should be 1/5

2) Your slope should be $\frac{-3}{2}$

3) Your slope should be 1/2

I hope this helps! : )

5 0

2 years ago