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lyudmila [28]
3 years ago
14

There are 16 seagulls at 1 pm on the beach. By 3 pm, there were 40 seagulls. What is the constant rate of change?

Mathematics
1 answer:
My name is Ann [436]3 years ago
3 0
For every one hour 12 seaguls show up
12 seaguls for every one hour
the answer i think is 12 seaguls per hour
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Simplify the following expressions ( combine like-terms )
galina1969 [7]

Answer:

6x

Step-by-step explanation:

Step 1: Write equation

x + 2x + 3x

Step 2: Combine like terms

3x + 3x

6x

5 0
3 years ago
A 5-gallon jug of cleaning solution contains 6% bleach. How much pure water should be added to it to dilute to 4% bleach?
mihalych1998 [28]
Let's bear in mind that 5 gallons with a solution of 6% bleach, contains some water plus some bleach, how much bleach?  well, is just 6% of 5 gallons or namely (6/100) * 5 gallons, or 0.30 gallons.

if we use "x" gallons of water, well pure water has no bleach, so is 0% bleach, and it has a (0/100) * x or 0x gallons of bleach.

the mixture will be say "y" gallons, and is 4% bleach, so (4/100) * y is 0.04y gallons in the mixture of bleach.

\bf \begin{array}{lcccl}
&\stackrel{gallons}{quantity}&\stackrel{\textit{\% of bleach}}{amount}&\stackrel{\textit{gallons of bleach}}{amount}\\
&------&------&------\\
\textit{pure water}&x&0.00&0x\\
\textit{6\% solution}&5&0.06&0.3\\
-----&------&------&------\\
mixture&y&0.04&0.04y
\end{array}
\\\\\\
\begin{cases}
x+5=\boxed{y}\\
0x+0.3=0.04y\\
---------\\
0.3=0.04\left( \boxed{x+5} \right)
\end{cases}
\\\\\\
0.3=0.04x+0.2\implies 0.1=0.04x\implies \cfrac{0.1}{0.04}=x\implies 2.5=x
3 0
3 years ago
Last year, sales at Company X were 10% greater in February than in January, 15% less in March than in Feb, 20% greater in April
Svetlanka [38]

Answer:

  d.  May

Step-by-step explanation:

Working through the chain, we have ...

  Feb = 1.10×Jan

  Mar = 0.85×Feb = 0.935×Jan

  Apr = 1.20×Mar = 1.122×Jan

  May = 0.90×Apr = 1.0098×Jan

  Jun = 1.05×May = 1.06029×Jan

The multiplier that is closest to 1 is 1.0098, so May has sales closest to January.

_____

The percentage increase or decrease can be converted to a multiplier by adding it to 1. If p% is the percentage change, then adding it to an original value looks like ...

  original + p% × original = original × (1 +p%) . . . . . . . distributive property

And p% translates to a decimal number by replacing % with /100 or ×0.01.

  10% increase:   original × (1 + 10/100) = original × 1.10

  15% decrease:   original × (1 - 15/100) = original × 0.85

6 0
3 years ago
Will give brainliest, <br> (404/4)x(2x2) to the power of 2.
Ganezh [65]

Answer:

163216

Step-by-step explanation:

If it's the sign of multiplication

404/4=101

2*2=4*101=404^2=163216

or,

If it's x

(404/4)x(2x2)

(101)x(2x2)

101x (4x)^2

1616x^2

2611456

I am not sure if it's right

7 0
3 years ago
If A is an obtuse angle and cos A = 3/5, find the values of tan A
slega [8]

Answer:

the value has to be 54.6 and up

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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