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Temka [501]
2 years ago
12

Solve the following proportion for u u/5=8/3 round answer to nearest tenth

Mathematics
1 answer:
rjkz [21]2 years ago
4 0

Answer:

Step-by-step explanation:

u/5=8/3

multiply by : 5

u = 40/3

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Given f(x) = 3 and g(x) = 5x + 7, find (f + g)(-8).
levacccp [35]

Answer:

-30

Step-by-step explanation:

f(x) = 3 so f(-8) = 3;

g(x) = 5x + 7, so g(-8) = 5(-8) + 7 = -33

Then (f + g)(-8) = 3 - 33 = -30

This is the sum of two functions both evaluated at x = -8.

4 0
3 years ago
the sum of three numbers is 131. the third number is 4 times the first. the second number is 5 more than the first. what are the
Sphinxa [80]

Step-by-step explanation:

let the numbers are:

a, b, and c

the equation would be:

a+b+c = 131

c = 4a

b = a+5

=>

a + a+5 +4a = 131

6a +5 = 131

6a = 131-5

6a = 126

a= 126/6

a = 21

b = a+5 = 21+5

b = 26

c = 4a = 4(21)

c = 84

4 0
2 years ago
Help me please !!!! I need to make sure I am correct with my thinking
Lana71 [14]
1.  Use the Pythagoras theorem
13^2 = x^2 + 5^2
solve for x and youll get the height of the roof.

2.  let x = length of the rpoe)-

x^2 = 9^2 + 12^2

3. Pythagoras again 
20^2 = x^2 + 12^2
7 0
3 years ago
Read 2 more answers
Which graph comparing time and dollars would be best represented by an exponential function?
Rasek [7]

Answer:

x and y

Step-by-step explanation:

because it make sense

6 0
2 years ago
Read 2 more answers
Write the standard form of an equation of an ellipse subject to the given conditions.
irina [24]

Answer:

The answer is below

Step-by-step explanation:

The standard form of the equation of an ellipse with major axis on the y axis is given as:

\frac{(x-h)^2}{b^2} +\frac{(y-k)^2}{a^2} =1

Where (h, k) is the center of the ellipse, (h, k ± a) is the major axis, (h ± b, k) is the minor axis, (h, k ± c) is the foci and c² = a² - b²

Since the minor axis is at (37,0) and (-37,0), hence k = 0, h = 0 and b = 37

Also, the foci is at (0,5) and (0, -5), therefore c = 5

Using c² = a² - b²:

5² = a² - 37²

a² = 37² + 5² = 1369 + 25

a² = 1394

Therefore the equation of the ellipse is:

\frac{x^2}{1369}+ \frac{y^2}{1394} =1

6 0
2 years ago
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