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Nitella [24]
3 years ago
13

If 2(x + 2) + 4(x - 1) = 8, then 3x =

Mathematics
1 answer:
lubasha [3.4K]3 years ago
3 0

Answer:

3x=4

Step-by-step explanation:

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Divide 380 among A, B and C in such a way that B gets 30 more than A and C gets 20 more than B. ​
Readme [11.4K]

Answer:

A = 100 B = 130 C = 150

Step-by-step explanation:

Translated into a system of equations:

A+B+C = 380

B = A+30

C = B + 20

So we find B from the last one:

B = C-20

Plug it in the second one:

C-20 = A+30

A = C-50

Plug it in the first:

C-50 + C-20 + C = 380

3C - 70 = 380

3C = 450

C=150

A = C - 50 = 150 - 50 = 100

B = C - 20 = 150 - 20 = 130

6 0
2 years ago
Read 2 more answers
A train leaves the station at time t=0. Traveling at a constant​ speed, the train travels kilometers in 2 hours. Is this a linea
slega [8]
A train leaves the station at time xequals
0.
Traveling at a constant​ speed, the train travels 328

km in 3.4

h. Round to the nearest 10 km and the nearest whole hour. Then represent the​ distance, y, the train travels in x hours using a​ table, an​ equation, and a graph. give brainliest x
4 0
2 years ago
Read 2 more answers
The graph shows a probability distribution. What is P(X<5)
Thepotemich [5.8K]

Answer:

P(x < 5) = 0.70

Step-by-step explanation:

Note:  The area under a probability "curve" must be = to 1.

Finding the sub-area representing x < 5 immediately yields the desired probability.

Draw a dashed, vertical line through x = 5.  The resulting area, on the left, is a trapezoid.  The area of a trapezoid is equal to:

 (average length)·(width, which here is:

  2 + 5

----------- · 0.02  =  (7/2)(0.2) =  0.70

      2

Thus, P(x < 5) = 0.70

7 0
3 years ago
Solve for x 8/x +1/5 = 3/x
HACTEHA [7]

Answer:

I think x=-25

Step-by-step explanation:

8 0
3 years ago
Find angle m and angle n
san4es73 [151]

Answer:

m∠M = 79°

m∠N = 66°

Step-by-step explanation:

∠MPN is supplementary to ∠MPQ, so m∠MPN = 35

The sum of the measures of a triangle is 180.

So, m∠M + m∠N + m∠MPN = 180

5y + 4 + 4y + 6 + 35 = 180

9y + 45 = 180

9y = 135

y = 15

m∠M = 5y + 4 = 5(15) + 4 = 75 + 4 = 79

m∠N = 4y + 6 = 4(15) + 6 = 66

Another way to do this problem, which is easier, is to know that an exterior angle of a triangle is equal to the sum of the two remote interior angles.

That means 5y + 4 + 4y + 6 = 145

                      9y + 10 = 145

                      9y = 135

                         y = 15

From knowing the value of y you can now find the measures of angles M and N

5 0
2 years ago
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