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3 years ago

HELP FOR BRAINIEST AND 50 POINTS

2 answers:

7 0

X - speed of the current
40+x - speed with current
40-x - speed against current

t-time
(40+x)*t=100
(40-x)*t=60

40t+xt=100
 + 40t-xt = 60
 80t =160
t = 2

40t+xt=100,
40*2+2x=100
80+2x=100
2x=100-80
2x=20
x=10 mi/h

10 mi/h speed of the current.

lapo4ka [179]3 years ago

4 0

The answer is x/10mph Hope I helped!

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How do I solve 6(5 - 2x) + 12 = -66?

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Step-by-step explanation:

Step 1: Write equation

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Step 3: Check

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There are 12 red marbles and 8 green marbles in a bag. What is the probability of selecting a red

madam [21]

Answer:

The probability of selecting a red marble, not replacing it, and then selecting a green marble from the bag is 24/95

Step-by-step explanation:

Number of red marbles = 12

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Probability of selecting red marble = $\frac{12}{20}$

Since it is the case of no replacement

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Probability of selecting green marble = $\frac{8}{19}$

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3 years ago

<img src="https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%209%20%2B%202x%20-%203y%20%3D%208" id="TexFormula1" title="x + y = 9 + 2x -

Vadim26 [7]

Answer:

(7,2)

Step-by-step explanation:

x + y = 9 + 2x - 3y = 8 is really two equations, and you should show this by separating x + y = 9 from 2x - 3y = 8 through the use of a comma, or the word "and," or through writing only one equation per line.

Here you have the system of linear equations

x + y = 9

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Let's solve this system by elimination. Mult. the 1st eqn by 3, obtaining the system

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5x = 35, so that x = 7. Subbing 7 for x in x + y = 9, we get 7 + y = 9, indicating that y = 2.

Thus, the solution to this system of equations is (7,2).

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