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Julli [10]
3 years ago
9

If 5x = b and b = -45, what is x? *

Mathematics
1 answer:
velikii [3]3 years ago
7 0
It’s -9
because math you divide......
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Work out m and c for the line y= x+4​
exis [7]

Answer:

M = 1, C = 4

Step-by-step explanation:

Just take note that all linear equation have the form Y = Mx + C.

Here you can read directly from the equation given.

5 0
3 years ago
List all sets that apply for - 1/2 need help asap
rusak2 [61]

Answer:

1 and 2

2 and 4

3 and 6

4 and 8

5 and 10

6 and 12

7 and 14

8 and 16

9 and 18

10 and 20

here are some examples, there is so much. But I hope this helped you out!

3 0
3 years ago
A passenger plane flew from Texas to Frankfurt and back. The round trip is 9900 km.
svp [43]

We want to find the average speed of the plane in still air, we will get that the average speed of the plane in still air is 355.3 km/hr

So we know that the total trip is 9900km, so from Texas to Frankfurt the distance is half of that:

9900km/2 = 4950km

Now, The speed of the plane in still air is x km/hr

The speed of the air is 50 km/hr, and it flows from Frankfurt to Texas.

So in the first part of the trip, the wind blows in opposite direction to the motion of the plane, thus the speed of the plane will be:

(x - 50) km/hr

While in the return trip the wind blows in favor of the plane, in this case, the speed is:

(x + 50)km/hr

Then if the first part of the trip lasts for T hours (the second for T - 4 hours) we can write the system of equations:

(x - 50)*T = 4950

(x + 50)*(T - 4) = 4950

Where I removed the units so it is easier to read.

If we isolate T in the first equation we get:

T = 4950/(x - 50)

Now we can replace this in the other equation to get:

(x + 50)*(4950/(x - 50)  - 4) = 4950

If we multiply both sides by (x - 50) we get:

(x + 50)*4950 - 4*(x + 50)*(x - 50) = 4950*(x - 50)

Now we can solve this for x:

(x + 50)*4950 - 4*(x^2 - 2500) - 4950*(x - 50) = 0

100*4950 - 4*(x^2 - 2500)  = 0

495000 - 4*x^2 + 10000 = 0

505000 = 4*x^2

√(505000/4) = x = 355.3

The average speed of the plane in still air is 355.3 km/hr

If you want to learn more about systems of equations, you can read:

brainly.com/question/13476446

4 0
2 years ago
If a sequence of 8 consecutive odd integers with increasing values has 9 as its seventh term. What is the sum of the terms of th
klemol [59]

Answer:

Sum = 32

Step-by-step explanation:

Given

Sequence = Consecutive Odds

T_7 = 9

Required

The sum of the terms

A sequence of odd number has a difference of 2. So, the sequence is represented as:

S = \{-3,-1,1,3,5,7,9,11\}

Add up all terms in the sequence

Sum = -3-1+1+3+5+7+9+11

Sum = 32

8 0
3 years ago
a poll was conducted by a marketing department of a video game company to determine the popularity of a new game that was target
wolverine [178]

Answer:

False

Step-by-step explanation:

7 0
3 years ago
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