All categories

3 years ago

HELP ME LOOK AT THE PHOTO

Mathematics

1 answer:

Assoli18 [71]3 years ago

6 0

Answer:

The answer to the question provided is 7.

Step-by-step explanation:

$7x + 9 = 8x + 2 \\ \frac{ - 8x \: \: \: \: = - 8x}{ - 1x + 9 = 2 } \\ \frac{ \: \: \: \: \: \: \: \: - 9 = - 9}{ \frac{ - 1x}{ - 1} = \frac{ - 7}{ - 1} } \\ x = 7$

[I apologize if this isn't the answer]

You might be interested in

A Web music store offers two versions of a popular song. The size of the standard version is

kicyunya [14]

2.4x+4.7(4x)=5936
Solve for x
X=280 standard version

4×280=1,120 high-quality version

5 0

3 years ago

Write 5^3 x √5 as a single power of 5

MakcuM [25]

√5 = 5^(1/2)

Multiplying two number with the same base has as result a number with the same base and the sum of the exponents so:

1/2 + 3 = 7/2
which means
5^3 x 5^(1/2) = 5^(7/2)

5 0

2 years ago

The population of a city is 250,000 and the annual growth rate is 2.2%. Write an equation to model the population y after x year

Zinaida [17]

Answer:

$y= 250000(1.022)^x$

Step-by-step explanation:

The population of a city is 250,000 and the annual growth rate is 2.2%

General equation for exponential growth is

$y= P(1+r)^x$

Where y is final population and P is the initial population

'r' is the rate of growth and x is the number of years

p = 25000 and r= 2.2%= 0.022. Replace all the values in the general equaiton

$y= P(1+r)^x$

$y= 250000(1.022)^x$

3 0

3 years ago

Please help please help

BigorU [14]

Answer:

(1/2, 1&1/2)

Step-by-step explanation:

the x-axis, which is the horizontal axis, is always written first. the y-axis, vertical, is written second. because the points give are spaced out every other line, it shows that there fractional numbers must be used

6 0

2 years ago

Please show step by step of working out the value of r for which is A minimum and calculate the minimum surface area of the cont

Genrish500 [490]

Answer:

A = 59.63cm^2

Step-by-step explanation:

You have the following function for the surface area of the container:

$A=\pi r^2+\frac{100}{r}$ (1)

where r is the radius of the cross sectional area of the container.

In order to find the minimum surface are you first calculate the derivative of A respect to r, to find the value of r that makes the surface area a minimum.

$\frac{dA}{dr}=\frac{d}{dr}[\pi r^2+\frac{100}{r}]\\\\\frac{dA}{dr}=2\pi r-\frac{100}{r^2}$ (2)

Next, you equal the expression (2) to zero and solve for r:

$2\pi r-\frac{100}{r^2}=0\\\\2\pi r=\frac{100}{r^2}\\\\r^3=\frac{50}{\pi}\\\\r=(\frac{50}{\pi})^{1/3}$

Finally, you replace the previous result in the equation (1):

$A=\pi (\frac{50}{\pi})^{2/3}+\frac{100}{(\frac{50}{\pi})^{1/3}}}$

$A=59.63$

The minimum total surface area is 59.63cm^2

3 0

3 years ago