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yulyashka [42]
3 years ago
11

What is the simplified value of the expression below?

Mathematics
2 answers:
Karolina [17]3 years ago
5 0
4(-8+4.5)
-32+18
-14

6.25+(-8.25)
-2

-14/-2

7

The answer is 7.
Shalnov [3]3 years ago
3 0

Answer:

7

Step-by-step explanation:

First we will evaluate the numerator:

4(-8+4.5)

We will use the order of operations (PEMDAS).  First we evaluate the expression inside parentheses.

-8+4.5 = -3.5

This gives us 4(-3.5) = -14

Now we will evaluate the denominator:

6.25+(-8.25) = -2

This gives us

-14/-2 = 7

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HELP PLEASE!!! I NEED THIS NOWWWWW!!
Ugo [173]

Part A - linear functions change at a constant rate.. while exponential functions change at a constant percent rate... that sounds the same but it's not.  A linear function will go up (or down) the same amount when the time period is the same...  like up 1,000 more visitors every month... if this happens, when you subtract the visitors for month 10-month 9, you will get the same answer as when you subtract he visitors for month 9-month 8.  

An exponential function will go up by the same % when the time period is the same... so it'd be like if it went from 1,000 to 1,100 (that's up 100, which is 10% of 1,000) and then from 1,100 to 1,210 (that's up by 110, which is 10% of 1,100). If this happens you get the same answer when you divide the visitors for month 10 by the visitors from month 9 as you get when you divide the visitors for month 9 by the visitors from month 8.    (sometimes because of decimals you only get really really close to the same but that counts).

This one is exponential because dividing gets you around 2.09 every time

Part B

Since dividing # of visitors by the # from the month before gets you around 2.09 each time, we multiply that by 100 to get the % version of the decimal.

So that's 209%... but that's not how much it changes by or grows by... that's what it ends up.  It goes from itself (100%) to a bigger # (209%).. that's a 209-100 = 109% increase each month.



Part C

you need to think a little bit about what's going on in class.... becasue there are a bunch of different ways to do this. Sometimes you make an equation, sometimes you work backwards.


Here's one way... since multiplying visitors from week 8 by 2.09 gets you week 9 visitors.. and multipliying week 9 visitors by 2.09 gets you week 10... etc.... we can go backwards...

Week 7 visitors times 2.09 would equal the week 8 visitors

so,  w(2.09)=5.74

if we divide both sides by 2.09 we get w is equal to about 2.7464...  so the week 7 visitors is about 2.7464 (thousands) or 2,746.


Hope that helps



6 0
3 years ago
What is f(-3) for the<br> function f(a)=-2a?-5a+4?
Olegator [25]

Answer:

13

Step-by-step explanation:

f(-3)=2(-3)-5(-3)+4. = -6+15+4= 13. f(a)=13

8 0
2 years ago
-4x + 11y = 15<br><br> x=2y<br><br><br> Solve for y and x
Stolb23 [73]

Answer:

to find Y

-4x + 11y = 15

x - 2y = 0

.

equal= -3x + 9y= 15

since x=2y

-3(2y) + 9y = 15

-6y + 9y =15

3y = 15

y = 15/ 3

y = 5

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to find x

using x=2y

since

y=5

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x= 2(5)

x= 10

8 0
2 years ago
If 1 square food of grass seed = 25cents ,then how much would grass seed cost for 55,000 square feet of grass seed
vagabundo [1.1K]
Okay. So 25 cents is expressed as 0.25. it is $0.25 for a square foot of grass seed. To find the cost for 55,000 square feet of grass seed, all you have to do is multiply the cost per square foot by the amount of square feet total. In this case, we would multiply 55,000 by 0.25. 55,000 * 0.25 is 13,750. There. The total cost would be $13,750.
6 0
3 years ago
The product of some negative number and 4 less than twice that number is 336. Find the number.
Dennis_Churaev [7]

Let the number be 'x'

Since, the product of number and 4 less than twice that number is 336.

x \times [(2 \times x) -4] = 336

x[2x -4] = 336

2x^2 -4x- 336=0

x^2-2x-168=0

Now, we will split the middle term, we get

x^2-14x+12x-168=0

x(x-14)+12(x-14)=0

(x-14)(x+12)=0

So, (x-14)=0 or (x+12)=0

So, x = 14 or x = -12

Therefore, the negative number is '-12'.

7 0
3 years ago
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