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Black_prince [1.1K]
3 years ago
6

4x+5=6x-7 How do I solve this?

Mathematics
2 answers:
vodka [1.7K]3 years ago
3 0

Answer:

x=6

Step-by-step explanation:

4x+5=6x-7

4x-6x=-7-5

-2x=-12

x=-12/-2

x=6

antoniya [11.8K]3 years ago
3 0

Answer: x=6

Isolate the variable by dividing each side by the factors that don't contain variables

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Problem
Stels [109]

Answer:

The maximum speed of Hal's airplane in still air is:

v= 250\ miles/h

The speed of the wind

c = 50\ miles/h

Step-by-step explanation:

Remember that the velocity v equals the distance d between time t.

v=\frac{d}{t}  and t*v=d

The distance that Hal travels when traveling with the wind is:

(2\ hours)(v + c) = 600 miles

Where v is the speed of Hal and c is the wind speed.

The distance when traveling against the wind is:

(3\ hours)(v-c) = 600 miles

Now we solve the first equation for v

(2)(v + c) = 600

2v + 2c = 600

2v= 600-2c

v= 300-c

Now we substitute the value of v in the second equation and solve for c

3((300-c)-c) = 600

3(300-2c) = 600

900-6c = 600

-6c = 600-900

-6c = -300

6c = 300

c = 50\ miles/h

Then:

v= 300-(50)

v= 250\ miles/h

The maximum speed of Hal's airplane in still air is:

v= 250\ miles/h

The speed of the wind

c = 50\ miles/h

7 0
3 years ago
Evaluate each expression.<br> 1) 10x5+4²+(5+30-10)<br> ezzyy
pogonyaev

Answer:

91

Step-by-step explanation:

10*5+4^2+(5+30-10)

50+16+(35-10)

66+(25)

66+25

91

7 0
3 years ago
Hi! How do you solve this? Step by step??
Mars2501 [29]

Answer:

30

Step-by-step explanation:

Substitue 3 for every x in the equation

10(3)-(3*3)(2*3)+(3)^2(2*3)

Multiply

30-(9)(6)+9(6)

30-54+54=30

7 0
3 years ago
Read 2 more answers
Jolene invests her savings in two bank accounts, one paying 4 percent and the other paying 10 percent simple interest per year.
Nostrana [21]

Answer:

<h2>$ 22200 in higher yielding bank and $ 44400 in lower yielding bank</h2>

Step-by-step explanation:

       Jolene invests in two bank accounts. The first account gives a 4% interest per year and the second bank gives a 10% interest rate per year.

       She puts twice as much in the lower yielding bank account. Let us denote the amount put in high yielding bank account by x. Lower yielding bank account will have 2x.

       Interest\text{ }per\text{ }year=Principal\times Interest\text{ }rate

Interest from lower yielding bank = \dfrac{4}{100} \times 2x=\dfrac{8x}{100}

Interest from higher yielding bank = \dfrac{10}{100} \times x=\dfrac{10x}{100}

Total Interest per year = $ 3996 = \dfrac{8x}{100} +\dfrac{10x}{100}=\dfrac{18x}{100}

x=22200 \$

∴ Jolene invested $ 22200 in higher yielding bank and $ 44400 in lower yielding bank.

4 0
3 years ago
HELPPPP PLSSSSSSSSSSSSSSSSSSSS
Bess [88]

Answer:

#1)

Angle A = 30 degrees; 180 - 150 = 30

Angle B = 120 degrees; 180 - 60 = 120

#2)

Angle A = 65 degrees; 180 - 115 = 65

Angle B = 25 degrees; 180 - 155 = 25

4 0
3 years ago
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