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Crazy boy [7]
3 years ago
5

Adele has 19 stamps in her collection.

Mathematics
2 answers:
svet-max [94.6K]3 years ago
7 0

Answer:

D(19+5)x3

Step-by-step explanation:

she has 19, then don gave her 5 more

19+5

her father also offered to buy her three times so

(19+5)x3

Dimas [21]3 years ago
3 0

Answer:

D

19+5 is the total in her collection

multiply by three to triple

(19+5)x3

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I have 31 stamps in total. I have 4 more 1 cent stamps than 8 cent stamps and twice as many one cent stamps as 12 cent stamps. I
Neko [114]

Answer:

There area 14 one cent stamps

Step-by-step explanation:

Let

x -----> the number of 1 cent stamps

y -----> the number of 8 cent stamps

z -----> the number of 12 cent stamps

we know that

0.01x+0.08y+0.12z=1.78 -------> equation A

x=y+4 ------> y=x-4 -----> equation B

x=2z -----> z=0.5x ------> equation C

substitute equation B and equation C in equation A and solve for x

0.01x+0.08(x-4)+0.12(0.5x)=1.78

0.01x+0.08x-0.32+0.06x=1.78

0.15x=1.78 +0.32

0.15x=2.10

x=14

therefore

There area 14 one cent stamps

6 0
3 years ago
1 fourth to the 3rd power as a fraction
lukranit [14]
1/64 is the answer as a fraction
7 0
3 years ago
Read 2 more answers
Find the area of the figure. Round your answer to the nearest tenth.
Natasha2012 [34]

Answer:

D: 65 km²

Step-by-step explanation:

The formula for area of a hexagon when given the base is

A = (3/2)(√3)b²     where b is the length of the base

Here, b is given as 5, plug that in and simplify

A = (3/2)(√3)(5²)

       A =  (3/2)(√3)(25)

          A = (75√3)/2

              A ≈ 64.95 ≈ 65

5 0
3 years ago
Help with 1 and 3 if possible show work
Vinvika [58]
1)

\bf \qquad \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+r\right)^{t}
\quad 
\begin{cases}
A=\textit{compounded amount}\\
P=\textit{original amount deposited}\to &\$600\\
r=rate\to 1.6\%\to \frac{1.6}{100}\to &0.016\\
t=years\to &2
\end{cases}
\\\\\\
A=600\left(1+0.016\right)^{2}

3)

\bf V(t)=1350(1.017)^t\implies 
\begin{array}{llllll}
V(t)&=&1350(&1 +& 0.017&)^t\\
A&=&P(&1+&\boxed{r}&)^t
\end{array}

notice the rate "r"... now, is in decimal format, as you saw on 1) is just r/100 so 1.6% was really 1.6/100 or 0.016  anyhow

to get the percentage form, just multiply it by 100

5 0
4 years ago
Find the missing side lengths. leave your answers as radicals in simplest form.
Murrr4er [49]

Answer:

x = 4 , y = 2

Step-by-step explanation:

Using the sine / tangent ratios in the right triangle and the exact values

sin60° = \frac{\sqrt{3} }{2} and tan60° = \sqrt{3} , then

sin60° = \frac{opposite}{hypotenuse} = \frac{2\sqrt{3} }{x} = \frac{\sqrt{3} }{2} ( cross- multiply )

x \sqrt{3} = 4\sqrt{3} ( divide both sides by \sqrt{3} )

x = 4

and

tan60° = \frac{opposite}{adjacent} = \frac{2\sqrt{3} }{y} = \sqrt{3} ( multiply both sides by y )

y \sqrt{3} = 2\sqrt{3} ( divide both sides by \sqrt{3} )

y = 2

6 0
3 years ago
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