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vivado [14]
2 years ago
7

Find the value of 9x + 4y when x = 4 and y=-5

Mathematics
2 answers:
Dmitry_Shevchenko [17]2 years ago
6 0

Answer:

16

Step-by-step explanation:

9x + 4y

Let x =4 and y = -5

9(4)+ 4(-5)

36 -20

16

omeli [17]2 years ago
4 0

Answer:

16

Step-by-step explanation:

substitute the values into the equation

9(4)+4(-5)

solve...

36-20=16

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In a research laboratory, a scientist measures the mass of a 1-carat diamond and finds it to be 200 milligrams, measured to the
vlada-n [284]

Answer:

D=3.5\ gr/cm^3

Step-by-step explanation:

<u>Density</u>

The density of an object of mass m and volume V is given by

\displaystyle D=\frac{m}{V}

It can be expressed in common units like gr/lt, Kg/m^3, gr/cm^3 or any other combination of proper mass [M] by volume [V] units.

The data provided in the question is

m=200\ mg = 0.2\ gr

V=0.057\ cm^3

Thus, the measured density is

\displaystyle D=\frac{0.2\ gr}{0.057 \ cm^3}

\boxed{D=3.5\ gr/cm^3}

We have expressed the result with 1 decimal place because the mass was measured to the nearest hundred milligrams (or one-tenth grams). Any further decimal is senseless because that precision comes from calculations, not from measurements.

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3 years ago
Two gyms offer different rates for taking Cross Fit classes. Muscles Gym charges $4 per
Sedaia [141]

Answer:

69

Step-by-step explanation:

3 0
3 years ago
How do you convert minutes to hours
Simora [160]

Easy, just do 60 seconds which equals a minute. Since we know that now simply use 60 minutes to get you to an hour. If your doing minutes to hours make sure there is a 0 at the end.

7 0
3 years ago
Starting at the origin, go five spaces up and three spaces to the left. Which point is plotted using these directions?
pentagon [3]

Answer:

(-3,5)

Step-by-step explanation:

If you start at the origin (0), going up 5 spaces will leave you at 5 for your y plot. Then, 3 spaces <em>left</em> leaves you at -3 for your x. However, when writing down plots, you write x before y. So, you are left with (-3,5) as your coordinate plot for the final answer.

8 0
3 years ago
Read 2 more answers
Using f(X)=x+2 and g(x)=10x-4 , what is f(2) + g(4) ?
Ksivusya [100]
F(2)+g(4)
evaluate them seperately
f(2)=2+2=4

g(4)=10(4)-4
g(4)=40-4
g(4)=36

f(2)+g(4)=4+36=40
3 0
3 years ago
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