7x - 7 = 126 what is x

Answer:

x = [tex]\frac{ln(16)}{ln(2)}[/tex]

Step-by-step explanation:

[tex]4^{2x-1} =8^{x+2}[/tex]

ln both sides like you would add the same number to both sides to keep the equation equivalent

[tex]ln4^{2x-1} = ln 8^{x+2}[/tex]

using log rules, exponents can be brought down as a constant multiplying ln

[tex](2x-1)ln(4) =(x+2)ln(8)[/tex]

use distributive property to remove parentheses

2xln(4) - ln(4) = xln(8) + 2ln(8)

isolate x

2xln(4) - xln(8) = 2ln(8) + ln(4)

rewrite the logs using log rules: ln(x) - ln(y) = ln([tex]\frac{x}{y}[/tex]) and the exponent rule stated above

xln([tex]4^{2}[/tex])-xln(8) = ln([tex]\frac{8^{2} }{4}[/tex])

factor out x

x(ln[tex]4^{2}[/tex]-ln8) = ln([tex]\frac{8^{2} }{4}[/tex])

again use log rules:  ln(x) - ln(y) = ln([tex]\frac{x}{y}[/tex])

x* [tex]ln(\frac{4^{2} }{8}[/tex][tex])[/tex]=  ln([tex]\frac{8^{2} }{4}[/tex])

now simplify the stuff inside the ln parentheses

x*ln(2) = ln(16)

x = [tex]\frac{ln(16)}{ln(2)}[/tex]

Answer:

300

Step-by-step explanation:

Let the number be X

62/100 × X = 186

X = 186 × 100/62

X = 300

Answer: 62% of 300 is 186

Step-by-step explanation:

62% of x = 186

62/100 x = 186

0.62x=186

×=300

Answer:

20-8 = 12 , he waste $12 if he got 4 cans 12 divide by 4 equal 3 so the one can cost $3

Step-by-step explanation:

Answer:y= -5

Step-by-step explanation:

-3(3)+4= -5

-3(3)= -9

-9 + 4= -5

Answer:

-5

Step-by-step explanation:

y = -3x + 4

If x = 3

Plug the value into the expression

We have

y = -3(3) + 4

= -9 + 4

= -5

Two numbers multiply into (-24) and adds up to (-10) are 2 & -12

Step-by-step explanation:

Here we need to find two numbers , with the following info:

Let us assume that two numbers are x & y .

two numbers multiply into (-24):

Two numbers are x and y , and there multiply is -24 i.e.

⇒ [tex]x(y) = -24[/tex]

two numbers adds up to (-10):

Two numbers are x and y , and there addition is -10 i.e.

⇒ [tex]x+y = -10[/tex] . .............. (1)

Let's solve this :

We know that , [tex](x+y)^2 = x^2 +y^2 +2xy[/tex]

⇒ [tex](x+y)^2 = x^2 +y^2 +2xy[/tex]

⇒ [tex](-10)^2 = x^2 +y^2 +2(-24)[/tex]

⇒ [tex]100 = x^2 +y^2 -48[/tex]

⇒ [tex]x^2 +y^2 =148[/tex]

Now,

⇒ [tex](x-y)^2 = x^2 +y^2 -2xy[/tex]

⇒ [tex](x-y)^2 = (148) -2(-24)[/tex]

⇒ [tex](x-y)^2 = (148) +48=196 = 14^2[/tex]

⇒ [tex]x-y = 14[/tex]     .......... (2)

Let's solve equation 1 & 2 by adding (1)+(2):

⇒ [tex](x+y)+(x-y) = -10 +14[/tex]

⇒ [tex]2x=4[/tex]

⇒ [tex]x=2[/tex]

Putting value of [tex]x=2[/tex] in [tex]x-y = 14[/tex] :

⇒ [tex]2-y = 14[/tex]

⇒ [tex]y = -12[/tex]

Therefore, two numbers multiply into (-24) and adds up to (-10) are 2 & -12.

The number of boys in the schools is 104.

Step-by-step explanation:

Given,

The ratio of boys and girls is 8:9

Number of girls = 117

Let us take,

Number of boys = 8x

Number of girls = 9x

To find the number of boys.

According to the problem,

9x = 117

or, x = [tex]\frac{117}{9}[/tex]

= 13

Hence, the number of boys = 13×8 = 104

Answer:

Step-by-step explanation:

Let the number be n.

Then:

99 + n > 199

if you wish to solve this, subtract 99 from both sides, obtaining n > 100

We can use the Copy Dot Flip Method to solve this.

Steps to solve:

1 3/4 ÷ 2/3

~Turn 1 3/4 into an improper fraction

1 3/4 = 7/4

~Change the symbol and flip 2/3

7/4 * 3/2

~Multiply both numerators and denominators

21/8 or 2 5/8

Best of Luck!

Answer:

21/8 or 2 5/8

Step-by-step explanation:

1 3/4 ÷ 2/3

Convert to improper fractions

7/4 ÷ 2/3

Find the reciprocal of 2/3 and multiply

7/4 * 3/2

Multiply (numerator * numerator) / (denominator * denominator)

21/8

Convert to a mixed fraction

2 5/8

Hope this helps :)

Answer:

There are 13 cards for each suit so the first fraction is 13/52 and the next one is 13/51 as there is no replacement for the first card you pulled.

Multiplying them you get: 13/52*13/51= 169/2652,

Then you divide both sides by 13 to get: 13/204

So, the answer is C.

I hope this helps!

The probability of drawing a club and then a diamond consecutively from the deck without replacement is 13/204.

Option C is the correct answer.

It is the chance of an event to occur from a total number of outcomes.

The formula for probability is given as:

Probability = Number of required events / Total number of outcomes.

We have,

Number of cards = 52

Number of clubs = 13

Number of diamonds = 13

Now,

The probability of drawing a club.

= 13/52

And,

The probability of drawing a diamond consecutively from the deck without replacement.

= 13/51

[ There will be only 51 cards in total since we are not replacing ]

Now,

The probability of drawing a club and then a diamond consecutively from the deck without replacement.

= 13/52 x 13/51

= 13/4 x 1/51

= 13/204

Thus,

13/204 is the probability of drawing a club and then a diamond consecutively from the deck without replacement.

Learn more about probability here:

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Answer:

[tex]\frac{3}{8}[/tex]

Step-by-step explanation:

since [tex]\frac{5}{8}[/tex] has been completed

the remaining would be :

[tex]\frac{8}{8} -\frac{5}{8}[/tex]

since denominators are the same

= [tex]\frac{8 - 5}{8} \\\\[/tex]

= [tex]\frac{3}{8}[/tex]

the fraction of the race that is remaining is 3/8

Answer:

SU = 26 meters

Step-by-step explanation:

Based on the definition of a parallelogram, we know that the diagonals bisect each other, so we know that:

UV = VS

x + 3 = 2x - 7

10 = x

Now that we know "x", we can find the length of SU:

SU = x + 3 + 2x - 7

SU = (10) + 3 + 2(10) - 7

SU = 13 + 20 - 7

SU = 33 - 7

SU = 26 meters

Answer:♣ = Vertical angles theorem

♦ =SAS

♠ =CPCTC

Step-by-step explanation:

Answer:

18 servings

Step-by-step explanation:

Because 6 divided by 1/3 is the same as 6*3, we can just do it that way so it makes more sense.

6*3= 18

And there you have your answer!

Answer:

f(4) = 11

Step-by-step explanation:

To evaluate f(4) substitute x = 4 into f(x)

f(4) = 3(4) - 1 = 12 - 1 = 11

Answer:

Perimeter = 63.9 cm.

Area = 166.96 cm^2 to the nearest hundredth.

Step-by-step explanation:

The perimeter = 16+20.9+27 = 63.9 cm.

To find the area you can use Heron's Formula.

Area = √ [ s(s-a)(s-b)(s-c)]  where  s = the semi-perimeter and a, b and c are the lengths of the 3 sides.

s = 63.9 / 2 =  31.95.

Area of the triangle = √ (31.95(31.95-16)(31.95-20.9)(31.95-27)]

 = 166.96 cm^2.

Answer:

a=5 and b=3

Step-by-step explanation:

a+b=8

okay, so the numbers that can make 8 are 4+4, 5+3, 6+2, and 7+1

Try 5+3

so plug them in

5+3=8

5*5=25

3*3=9

25-9=16

that's your answer

Answer:

Option B, i

Step-by-step explanation:

sqrt(-1) is i

Answer:  Option B, i

Answer: i got this square root(negative 1) =

i

Step-by-step explanation:

Answer: w= -9

Step-by-step explanation:

Set up an equation, 5 times a number is 5w, and 35 more, means plus 35. All of this is equal to -10, so the equation will be:

5w+35=-10

Subtract 35 from both sides

5w=-45

Divide by 5 on both sides

w= -9

Hope this helped!

Answer: multiplies

Explain: this is because exponentially is multiplication.

The table of exponential multiplies by the same amount each time to get to the next number.

In mathematics, an exponential function is a relationship of the type y = ax, where x is an independent variable that spans the entire real number line and is expressed as the exponent of a positive number.

In another meaning, an exponential function is that function above which a variable x has imposed.

For example [tex]3^{x}[/tex] , [tex]7^{x}[/tex] like that.

Let a general exponential function [tex]a^{x}[/tex] where a is constant.

Let x = 1,2,3,4,5....

At x = 1 ⇒ a¹ = a

At x = 2 ⇒ a² = a × a = previous numebr ×  (a)

At x = 3 ⇒ a³ = a² × a = previous number × (a)

So,

It is clear that in exponential function each term multiplies the same amount each time to get to the next number.

For more about exponential function,

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Answer: C

it's C) 2/3

Answer:

C! X = 2/3

Step-by-step explanation:

Next part on edge is

(C) X=1

The fish is 2.25 ft above the water surface.

Step-by-step explanation:

⇒ y = -16(0.375)² + 12 × 0.375

     = -2.25 + 4.5

     = 2.25 ft

The right answer is Option C: 3 units

Step-by-step explanation:

Given coordinates are;

A polygon has the following coordinates: A(3,-3), B(-3,-2), C(-5,1), D(-5,4), E(-4,6), F(-2,6), G(3,2).

For finding length of CD, we will find the distance between C and D.

C(-5,1) and D(-5,4)

Here;

[tex]x_1=-5, y_1=1\\x_2=-5, y_2=4[/tex]

Distance = [tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2[/tex]

[tex]Distance=\sqrt{(-5+5)^2+(4-1)^2}\\Distance=\sqrt{(0)^2-(3)2}\\Distance=\sqrt{(3)^2}\\Distance = 3[/tex]

Therefore;

The length of CD is  units.

The right answer is Option C: 3 units

Answer:

2

Step-by-step explanation:

Answer: _(32)(16)=(4)/(5)

Step-by-step explanation:

Answer:

The answer is 19

Step-by-step explanation:

Answer:so easy its 19 it's right i promise you

You have the right equation.

p(x) = 0.586041x - 3,200,000

3200000 of course represents the deduction from the loan

0.586041 - this number represents the amount of money left after taxes (58.6041% of the total is left)

We get this by taking into account all the taxes on top of another...

35% federal tax = 65% left

35% federal tax and 8% state tax = 65% x 92% left

35% federal tax and 8% state tax and 2% local tax = 65% x 92% x 98% left = 58.6041%

To get the profit plug in the given taxable income for x.

p(6775989) = 0.586041(6775989) - 3,200,000 = $771,007.37 approx.

answer: $771,007.37 approx.

Answer:

15

Step-by-step explanation:

2:3

X2 4:6

X5 10:15

Answer:

15 miles

Step-by-step explanation:

Divide 10 by 2, which equals 5. This gives you the amount of times she walks. Thus, if you multiply 3 miles times 5 (the amount of times she walks) it equals 15.

Answer:

40 passes

Step-by-step explanation:

we know that

Bobby catches 8 passes in 3 football games

so

using proportion

Find out how many passes does he  catch in 15 games

[tex]\frac{8}{3}=\frac{x}{15}\\\\x=8(15)/3\\\\x=40\ passes[/tex]

Answer: 40 passes

Step-by-step explanation:

Hi, to answer this we have to use proportions:

Proportion = Passes catched/ football games

Bobby catches 8 passes in 3 football games: 8/3

For 15 games: x/15

8 /3 = x/15

Solving for x

(8/3)15 =x

40 = x

He catches 40 passes in 15 games.

Feel free to ask for more if needed or if you did not understand something.

Answer:

42

Step-by-step explanation:

I think it's 42 because 42/-6 is -7

Answer:

z = 42

Step-by-step explanation:

Given -7 = z/-6

Cross multiply

-7 x -6 = z

Negative times negative gives you positive.

42 = z

z = 42

Answer:

0.3333

Step-by-step explanation:

To convert 33.33% to decimal, simply divide 33.33 by 100.

Answer: 0.3333

Step-by-step explanation:

33.33% = 33.33 / 100 = 0.3333.

Since 100 has 2 zeros, you count the decimal point in 33.33 forward twice.

The answers to the blanks are

1. 600,

2. 120,

3. 120,

4. 180.

Explanation: