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3 years ago

Kristen has 64 coins in her piggy bank. she has $9.25 in dimes and quarters. how many dimes and quarters does she have.

Mathematics

1 answer:

IRISSAK [1]3 years ago

8 0

I believe she has 25 dimes in quarters and the rest in which is 9.00 in quarters

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Is it a function and what is the Domain and the Range

Schach [20]

Answer:

a-is a function

the domain is:[-3,1]

the range is :[-4,0]

b- is not a function

7 0

3 years ago

Read 2 more answers

A scientist is studying the population growth rates of two different species of rats in the same laboratory conditions. The popu

Korolek [52]

Since, population of species A is represented by : $P=2^{x} +19$

Let us find the population of species A, at the end of week 1:

i.e., x = 1

i.e., $P(1)=2^{1} +19$

i.e., $P(1)=2 +19$

i.e., $P(1)=21$

Also, since population of species B is represented by : $P=3^{x} +18$

Let us find the population of species B, at the end of week 1:

i.e., x = 1

i.e., $P(1)=3^{1} +18$

i.e., $P(1)=3 +18$

i.e., $P(1)=21$

Thus, at the end of 1 week, species A and species B will have the same population.

Hence, option D is correct.

4 0

3 years ago

Find an explicit rule for the nth term of the sequence.

taurus [48]

Answer: -4 . 2ⁿ⁻¹

Step-by-step explanation: This is a geometric progression

the nth term is given by arⁿ⁻¹

a = the first term of the sequence

r = common ratio

n= number of terms

for this sequence

a = -4

r = -8/-4 = 2

nth term, an = -4 . 2ⁿ⁻¹

3 0

3 years ago

Need help with this question.

Vaselesa [24]

Answer:

4:1 (I think)

Step-by-step explanation:

Let's write some equations first:

For both prices increasing by 20:

$\frac{x+20}{y+20} =\frac{5}{2}$

then we can use cross multiplication

2x+40=5y+100

For both prices decreasing by 5:

$\frac{x-5}{y-5} =\frac{5}{1}$

same here:

5y-25=x-5

Using substitution for 5y, we get: 5y=x+20

2x+40=5y+100

2x+40=x+20+100

x=80

plugging this in to the second equation:

5y-25=x-5

5y-25=80-5

5y-25=75

5y=100

y=20

therefore we get x:y=80:20

4:1

4 0

3 years ago

A cosmetics company makes three batches of a nail polish color called Purple Dusk using the recipe shown.

Ivanshal [37]

Answer:

Batch 1:- Red 2 ounces Blue 1 1/2 ounces

Batch 2:- Red 3 White 3 3/4 ounces.

Batch 3:- White 4 1/6 Blue 2 1/2 ounces.

Step-by-step explanation:

Batch 1

Amount of the white paint = 5/12 of the batch = 2 1/2 or 5/2 ounces.

5/12 is equivalent to 5/2 ounces of white paint.

1/12 ......................... 5/2 / 5 = 5/10 = 1/2 ounce.

Red paint.

!/3 of the product contains red paint which is 4/12 so this is 4 times 1/12 = 4 * 1/2 ounce = 2 ounces of red paint.

Blue paint.

Similarly to the above amount of blue paint = 1/4 =3/12

= 3 * 1/2 = 1 1/2 ounces of blue paint.

Batch 2.

We can calculate the missing quantities in a similar way to Batch 1.

Blue Paint = 3/12 of the product = 2 1/4 ( = 9/4) ounces so

1 /12 =

9/4 * 1/3 = 9/12 = 3/4 ounce

Red Paint:- 1/12 is equivalent to 3/4 ounce so

Amount of red paint = 4 * 3/4 = 3 ounces (answer)

White paint = 5 * 3/4 = 15/4 = 3 3/4 ounces (answer)

Batch 3.

Red paint = 3 1/3 ounces is equivalent to 4/12 of the product.

So 1/12 = 10/3 / 4 = 10/12 = 5/6 ounces.

White paint = 5/6 * 5 = 4 1/6 ounces.

Blue paint = 5/6 * 3 = 15/6 = 2 1/2 ounces.

3 0

3 years ago