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iVinArrow [24]
3 years ago
8

Evaluate 9+12÷3-1•4+2 using the correct order of operations

Mathematics
1 answer:
natita [175]3 years ago
4 0
The answer is 11 if you use PEMDAS! Here is my work:
9+4-4+2 = I multiplied and divided first
13-4+2....9+2....11
Hope this helped :))
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Given that f(x)=2x+3 , find: f(5x+3)
PIT_PIT [208]

Answer:

f(5x+3) = 10x + 9

Step-by-step explanation:

f(x) = 2x + 3

f(5x+3) = ??

Given this information, we know that x = 5x + 3. Therefore, to solve the new equation we need to plug 5x + 3 into the original equation

f(5x+3) = 2(5x+3) + 3

Now we distribute the 2

f(5x+3) = 10x + 6 + 3

Finally, combine like terms

f(5x+3) = 10x + 9

5 0
2 years ago
A scientist has 100 milligrams of a radioactive element. The amount of radioactive element remaining after t days can be determi
grandymaker [24]
The mass of the first shipment at time t is
m_{1}=100( \frac{1}{2} )^{ \frac{t}{10}}

The mass of the second shipment at time t is
m_{2}=100( \frac{1}{2} )^{ \frac{t-3}{10} }

At time t, the ratio of m₁ to m₂ is
\frac{m_{1}}{m_{2}} = \frac{100}{100}. \frac{(1/2)^{t/10}}{(1/2)^{(t-3)/10}} \\ =  \frac{(1/2)^{t/10}}{(1/2)^{t/10}}. \frac{1}{(1/2)^{-3/10}} \\ = (1/2)^{3/10} \\ = 0.8123

Therefore as a percentage,
\frac{m_{1}}{m_{2}} =100*0.8123 = 81.23 \%

Answer: B. 81.2%

4 0
3 years ago
What is the difference between the mean and the median of the following distribution?
natulia [17]
The definition of mean, is to add up all the numbers and divide it by how many numbers there are. So, in this case the mean would be 1+1+1+2+2+2+2+3+3+4+4+4+4+5+5+6+7+7+8+8+9 = 86. You would then take 86 and divide that by 21, and you would get 4.0
The definition of median states to find the middle of the numbers. So the median would be 4. 
So you would just take 4 - 4 = 0. 

0 would be correct.
8 0
3 years ago
Read 2 more answers
ANGLE KLM and ANGLE RST are supplementary angles. If ANGLE KLM is (7x) and ANGLE RST is (36-x) what is the value of x ? Please h
liberstina [14]

Answer:

30

Step-by-step explanation:

Angle B measures 60°. What is the measure of the angle that is complementary to angle B?

30°

60°

120180°

4 0
2 years ago
The diameter of a circle is 16 cm. Find its area in terms of Pi
babymother [125]

Answer:

A= 201.06

Step-by-step explanation:

A=πr^2

d=2r

Input the information into those formulas. Im honestly not sure if thats the right answer but its better than nothing.

6 0
3 years ago
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