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zalisa [80]
3 years ago
6

How is this not 6 I'm confused

Mathematics
2 answers:
trasher [3.6K]3 years ago
8 0

3 is being squared that is an exponet

so the times its self 2 times

3*3=9

so the problem would become:

5+9-7+1

jarptica [38.1K]3 years ago
5 0

Answer:

Your answer is 8

Step-by-step explanation:

Have you heard of PEMDAS?

P = Parenthesis

E = Exponent

M = Multiplication

D = Division

A = Addition

S = Subtraction

You do this in order from left to right. So...

5 + 3squared - 7 + 1         - First you do 3squared

5 + 9 - 7 + 1                       - Now you add 5 and 9

14 - 7 + 1                             - Subtract 14 and 7

7 + 1

= 8

Hope this helps! If so, Brainliest? :)


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For a line with the equation y=2/3x−4, the slope is:
statuscvo [17]

Answer:

The answer is B. 2/3 because y=mx+b mx us always the slope and b is the y intercept

5 0
3 years ago
if serena invested the 2500 in the cd that she yields at 4% interest, what will the cdbe worthafte 2 years?
Naya [18.7K]

Your answer would be <u>2700</u>

Using I=P*r*t

P= 2500

R= 4% (substitue to 0.04)

T= 2 Years

I= 2500* 0.04 * 2

I= 100* 2

I= 200

2500+200=

2700

6 0
3 years ago
Read 2 more answers
Can someone please help!!!
RideAnS [48]

Answers:

  • System 1:  x = 3 and y = -5
  • System 2: x = 1 and y = 2

==========================================================

Explanation:

For now, let's focus on system 1.

We have identical copies of "2y" in each equation, which means that if we were to subtract the equations straight down, then the y terms cancel out. That allows us to solve for x.

  • The x terms subtract to 7x-x = 6x
  • The y terms subtract to 0 and go away
  • The right hand sides subtract to 11 minus (-7) = 11-(-7) = 11+7 = 18

After doing those subtractions, we have the new equation 6x = 18 which solves to x = 3. Divide both sides by 6 to isolate x.

Once we know x, we can find out y.

7x+2y = 11

7(3)+2y = 11

21+2y = 11

2y = 11-21

2y = -10

y = -10/2

y = -5

or we can say

x+2y = -7

3+2y = -7

2y = -7-3

2y = -10

y = -10/2

y = -5

We should lead to the same y value either way. This helps confirm we have the correct x value.

Overall, the solution to system 1 is (x,y) = (3, -5)

----------------------------

Now onto system 2.

Unfortunately, we don't have identical y terms this time. But what we can do is double everything in the second equation to go from -x+y = 1 to -2x+2y = 2.

The new equivalent system is

\begin{cases}7x+2y = 11\\-2x+2y = 2\end{cases}

Now we have the same situation as before: Subtract straight down, solve for x.

  • The x terms subtract to 7x-(-2x) = 7x+2x = 9x
  • The y terms go away when subtracting
  • The right hand sides subtract to 11-2 = 9

So we have 9x = 9 and that solves to x = 1.

We'll use this x to find the y value.

7x+2y = 11

7(1)+2y = 11

7+2y = 11

2y = 11-7

2y = 4

y = 4/2

y = 2

Or you could pick on the second equation

-x+y = 1

-1+y = 1

y = 1+1

y = 2

6 0
2 years ago
Talulah is an ecologist who studies the change in the penguin population of Antarctica over time. She observed that the populati
Oksana_A [137]

Answer:

P(t) = 27000 * (1/9)^(t/4)

Step-by-step explanation:

This problem can me modelled with an exponencial formula:

P = Po * (1+r)^t

Where P is the final value, Po is the inicial value, r is the rate and t is the amount of time.

In this problem, we have that the inicial population/value is 27000, the rate is -8/9 (negative because the population decays), and the time t is in months, so as the rate is for every 4 months, we use the value (t/4) in the exponencial.

So, our function will be:

P(t) = 27000 * (1-8/9)^(t/4)

P(t) = 27000 * (1/9)^(t/4)

8 0
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3 laps : 6 minuets

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1 * 10 = 10

2 * 10 = 20

10 laps : 20 minuets

8 0
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