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pogonyaev
3 years ago
12

Solve for x3x+5=4x+9​

Mathematics
2 answers:
den301095 [7]3 years ago
7 0

Answer:

X= - 4

Step-by-step explanation:

All like terms should be together (they go to the other side with opposite signs) so

: 3x-4x=9-5

3x-4x=4

- x= 4

. To remove the negative sign from the x multiply by - 1 on both sides.

-x(-1) = 4(-1)

X= - 4

Korolek [52]3 years ago
4 0

Answer:

x = -4

Step-by-step explanation:

3x + 5 = 4x + 9

3x - 4x = 9 - 5

-x = 4

x = -4

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3 0
3 years ago
Tyler does squats and pushups. He wants to increase the number of each type of exercise by 20% by the end of the month. He curre
Semenov [28]

Answer:

Tyler currently does 40 squats

Step-by-step explanation:

Tyler does squats and pushups.

<u>Currently:</u>

Number of pushups = 25

Number of squats = x

Total number = 25 + x

<u>After increase:</u>

Number of pishups =25\cdot (1+0.2)=1.2\cdot 25=30

Number of squats =x\cdot (1+0.2)=1.2x

Total number =30+1.2x

If Tyler meets his goal, he will do a total of 13 more squats and pushups than he does now, thus

(30+1.2x)-(25+x)=13\\ \\30+1.2x-25-x=13\\ \\1.2x-x=13-30+25\\ \\0.2x=8\\ \\2x=80\\ \\x=40

6 0
3 years ago
A cell phone plan has a monthly cost that is shown in the table below. What is the correct statement regarding the average rate
BARSIC [14]

Answer:

Second from top...

The average rate of change is $0.07, meaning that for each minute of talk time, the monthly bill increases by $0.07.

Step-by-step explanation:

Pick any two points and calculate the slope which will represent the rate of change:

  (Minutes, Cost)

  (0, 9.95)

  (10, 10.65)

Rate of change:

slope m = (y₂ - y₁) / (x₂ - x₁)

             = (10.65 - 9.95) / (10 - 0)

             = 0.7 / 10

             = 0.07

y is cost

m is rate of change

x is minute(s) use

b is fixed monthly cost regardless if any minutes is used

  y = mx + b

  y = .07x + 9.95

4 0
3 years ago
(2,5) (7,9) (3,9) (5,8) is it a function
NeX [460]

Answer:

(2,5) (7,9) (3,9) (5,8)

The relation is a function.

4 0
3 years ago
Priscilla invests $10,000 in an account that compounds interest continuously and earns 11%. How long will it take for her money
Shkiper50 [21]

Answer:

Step-by-step explanation:

When the interest compounds continuously, our formula is

A(t)=Pe^{rt}

If we start with 10000 and are looking for how long, t, it takes to double, we are looking for how long it will take for our account to have 2 times 10000.  That's 20000.  Therefore, our equation is

20000=10000e^{.11t}

Divide both sides by 10000 to get

2=e^{.11t}

Take the natural log of both sides to "undo" that e:

ln(2)=ln(e^{.11t})

Again, since ln and e undo each other what we have now is

ln(2) = .11t and

\frac{ln(2)}{.11}=t so

t = 6.3 years

5 0
3 years ago
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