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saveliy_v [14]
3 years ago
11

Mary had five and one-half dollars. She spent tw wo and one-fourth dollars on a snack. How much money does Mary have left?

Mathematics
1 answer:
Levart [38]3 years ago
7 0
5/1-1/4=4/3 i thinkkkkkkkkkk so
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What is the range of function y=√(-2cos^2x+3cosx-1)
Ugo [173]
Hello Friend,here is the solution for your question


<span>so the given function is </span>
y= √(-2cos²x+3cosx-1)
 i.e = √[-2(cos²x-3/2+1/2)]
i.e = √[-2(cosx-3/4)²-9/16+1/2]
i.e. = √[-2(cos-3/4)²-1/16]
i.e. = √[1/8-3(cosx=3/4)²]-----------(1)

Now here  in this equation is this quantity :-
<span>(cosx=3/4)²----------------(2)   is to it's minimum value then the whole equation </span>
<span>i.e. = √[1/8-3(cosx=3/4)²] will be maximum and vice versa </span>


And we know that cosx-3/4 will be minimum if cosx=3/4
<span>therefore put this in (1) we get </span>
(cosx=3/4)²=0    [ cosx=3/4]
<span>hence the minimum value of the quantity (cosx=3/4)² is 0 </span>

<span>put this in equation (1) </span>
we get ,
i.e. = √[1/8-3(cosx=3/4)²]
   =√[1/8-3(0)]        [ because minimum value of of the quantity (cosx=3/4)² is 0 ]
     =√1/8
      =1/(2√2)

<span>this is the maximum value now to find the minimum value </span>

<span>since this is function of root so the value of y will always be ≥0 </span>

<span>hence the minimum value of the function y is 0 </span>


<span>Therefore, the range of function </span>y is [0,1/(2√2)]


__Well,I have explained explained each and every step,do tell me if you don't understand any step._

8 0
3 years ago
Leah wants to find 450 + 416 using place value. Write the smaller problems she could use to find the sum. then find the sum.
Gennadij [26K]

Answer:

866

Step-by-step explanation:

She could add the hundreds first: 400+400=800

Then the tens: 50+10=60

Then the ones: 0+6=6

And add them all up: 800+60+6=866

5 0
2 years ago
Read 2 more answers
2. The restaurant bill you and your friend received was not itemized. You ordered 2 drink refills and the egg breakfast, for a t
PilotLPTM [1.2K]
3r+b=9.35
-
2r+b=8.40

r=0.95
7 0
3 years ago
Lisa completed the table to describe the product of a mystery one - digit factor and factor and each numbers
deff fn [24]

Answer: part A is 0, 2, 4, 6, 8 and part B is Because the products all are even, the mystery factor must also be an even number. We have selected all of the even one-digit numbers.

Step-by-step explanation:

So, the number you need to find is between 0 and 9, because is a 1-digit number. For example, it cannot be 10 because 10 is a 2-digit number.

So, the number could be like 0,1,2,3...etc

In the table, the "X" in the left upper corner is the symbol for multiplication.

The "?" in the left lower corner represents the mystery number.

The table shows that the product of the mystery number and 1,2,3,4 and 5 is always an even number

For example, the product of the mystery number and 3 is even.

That means that our mystery must be even.

So, we know that the mystery number is between 0 and 9 and it must be even.

Therefore, the mystery number can be one of the following numbers:

0, 2, 4, 6, 8

8 0
3 years ago
BEST ANSWER GETS BRAINLIEST
Nataliya [291]
The answer is d because 12c=20 = c=65/12 divide by both sides
4 0
2 years ago
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