All categories

3 years ago

If n + 7 = 10, evaluate 2n - 2 O 3 0 17 4 6

Mathematics

1 answer:

Alexandra [31]3 years ago

5 0

Answer:

The value of 2n - 2 is 4.

Step-by-step explanation:

Given the equation

$n + 7 = 10$

Subtract 7 from both sides of the equation

$n+7-7=10-7$

Simplify

$n=3$

Now substituting n = 3 in the equation

2n - 2 = 2(3) - 2

= 6 - 2

= 4

Therefore, the value of 2n - 2 is 4.

You might be interested in

Consider the line y = x . If the line is dilated by a factor of 1 3 , what is the equation of the resulting line? If the resulti

ella [17]

Answer:

The resulting equation after dilation: y=x.

The resulting equation after translation: y=x-1.

Step-by-step explanation:

The given equation of line

$y=x$

If a line passes through the center of dilation and dilated by factor k, then the equation of line is remains same.

It is given that the line is dilated by a factor of 1/3. The center of dilation is not given so the center of dilation is (0,0).

At x=0,

$y=0$

It means the line passes through the point (0,0). Since the line passes through the center of dilation, therefore the equation of line is remains same.

$y=x$

The translation is defined as

$y=x+b$

If b>0, then the graph shifts b units up and if b<0, then the graph shifts b units down.

The resulting line is translated 1 unit down.

$y=x-1$

Therefore, the equation of the resulting line is y=x-1.

3 0

3 years ago

What is 7.8×10^5 hours in days?

iragen [17]

Answer:

32500 Days

Step-by-step explanation:

$7.8$ × $10^{5}$ = $780000$

We know that there are 24 hours in a day.

⇒24 Hours = 1 Day

therefore $780000$ hours = $\frac{780000}{24} = 32500$ Days

7 0

3 years ago

How do you find out if an equation is linear or nonlinear?

pshichka [43]

While linear<span> equations are always straight, </span>nonlinear<span> equations often feature curves.</span>

8 0

3 years ago

Can someone please help me with one or both of these problems, I'm so confused but the assignment is due soon!!

Firlakuza [10]

Answer:

First question: 1270

Second question: 4080

Step-by-step explanation:

Here is the Sum formula:

$S_{n}=\frac{n}{2}(a_{1}+a_{n})$

where n represents the number of terms, and

$a_{1}$ is the first term, and $a_{n}$ is the last term.

Let's look at the first question:

k is the first number of the sequence, 5, and 20 is the last number of the sequence.

You can find the first term ( $a_{1}$ ) by substituting k in the formula for 5.

3(5)+26=15+26=41

You can find the last term ( $a_{n}$ ) by substituting k for 20 into the formula.

3(20)+26=60+26=86

now, knowing there are 20 terms in total, $a_{1} =41$ , and $a_{n} =86$ , we can put it into the Sum formula.

$S_{20}= \frac{20}{2} (41+86)$

$S_{20}= \frac{20}{2} (127)$

$S_{20}= 10 (127)$

$S_{20}= 1270$

Answer to the first question: 1270

Next question:

Even though the given formula uses n as the variable, this problem works the same way as the previous one.

Substitute n in the formula for k, which is 5 to find the first term: 14(5)+29=99

Substitute 20 for n to find the second term: 14(20)+29=309

Now assemble the Sum formula:

$S_{20}= \frac{20}{2} (99+309)$

$S_{20}= \frac{20}{2} (408)$

$S_{20}= 10(408)$

$S_{20}=4080$

Answer to the second question: 4080

5 0

3 years ago

50 points!!! please hurry

Margarita [4]

Answer:

It comes down to what the equals sign means. It means, that the two things mentioned on either side of the equation are the same thing. If you do something to the left side, you have presumably changed it.

Step-by-step explanation:

Hope this helps, If it did, then I would really appreciate it if you gave me Brainliest, I only need one more to rank up and it has taken forever to get to where I am currently. Thanks.

8 0

3 years ago

Read 2 more answers