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Andrej [43]
3 years ago
15

Multiple choice question!! Please help

Mathematics
1 answer:
qaws [65]3 years ago
3 0
The solution is (1,3). This is where the two lines intersect.
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The current of a river is 3 miles per hour. A boat travels to a point 176 miles upstream and 176 miles back in 19 hours. What is
serious [3.7K]

Answer:

If I am understanding your question, the total upstream is 8 miles and another 8 miles downstream.

Let s = the speed of the boat in still water

d = rt

8 = 5(s + 3)  downstream

8 = 5s + 15  equation 1

8 = 5(s - 3)   upstream

8 = 5s - 15    Add equation 1

8 = 5s + 15 

16 = 10s    Divide both sides by 10.

s = 16/10 = 8/5 = 1.6 mph

 

4 0
2 years ago
Judith has \$70 in a savings account that earns 5% interest , compounded annually .
Firlakuza [10]

Answer:

$81.03

Step-by-step explanation:

Given

n = 1 --- annually

t =3 --- time

r = 5\% --- rate

PV = \$70 ---- Present value

Required

The future value

This is calculated as:

FV = PV * (1 + \frac{r}{n})^{nt}

This gives:

FV = 70 * (1 + \frac{5\%}{1})^{1*3}

FV = 70 * (1 + 5\%)^3

FV = 70 * (1.05)^3

FV = 70 * 1.157625

FV = 81.03375

<em>The future value to the nearest cent is: $81.03</em>

4 0
2 years ago
is it possible draw a right triangle with and obtuse angle? if so draw it in the box if not write impossible. is it possible guy
Ipatiy [6.2K]
It is not possible. Since one of the angles has to be a right angle, the other two angles would have to add to 90. Therefore, neither of these angles can be more than 90 degrees. 

Hope this helps
3 0
3 years ago
Which of these sequences is a geometric sequence?
____ [38]

Answer:

if we take ratio then answer is option D

8 0
3 years ago
Solve the following equation simultaneously 1/x-5/y=7, 2/x+1/y=3​
maria [59]

Answer:

  (x, y) = (1/2, -1)

Step-by-step explanation:

Subtracting twice the first equation from the second gives ...

  (2/x +1/y) -2(1/x -5/y) = (3) -2(7)

  11/y = -11 . . . . simplify

  y = -1 . . . . . . . multiply by y/-11

Using the second equation, we can find x:

  2/x +1/-1 = 3

  2/x = 4 . . . . . . . add 1

  x = 1/2 . . . . . . . multiply by x/4

The solution is (x, y) = (1/2, -1).

_____

<em>Additional comment</em>

If you clear fractions by multiplying each equation by xy, the problem becomes one of solving simultaneous 2nd-degree equations. It is much easier to consider this a system of linear equations, where the variable is 1/x or 1/y. Solving for the values of those gives you the values of x and y.

A graph of the original equations gives you an extraneous solution of (x, y) = (0, 0) along with the real solution (x, y) = (0.5, -1).

6 0
2 years ago
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