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IrinaVladis [17]
3 years ago
12

John bought 3 pineapples and 2 watermelons for $8.50. Sue bought 2 pineapples and 4 watermelons for $13.00. Write and show a sys

tem of equations. You do not have to solve the system. Just show the system.​
Mathematics
1 answer:
AleksAgata [21]3 years ago
5 0
As per your question, total cost of watermelon should end with either 5(for odd quantity) or 0(for even quantity).

If the quantity of watermelon is odd, then the total cost value of pineapple should end with 3 and this is not possible when the cost of pineapple is ₹7.

So let's come to conclusion that the count(quantity) of watermelon should be any one of 0, 2, 4, 6.

If count of watermelon is 6: It will cost ₹30 and for remaining ₹8, we can buy 1 pineapple but still ₹1 will not be utilised. So 1 pineapple is not possible

If count of watermelon is 4: It will cost ₹20 and for remaining ₹18, we can buy 2 pineapple with ₹4 not being utilised. So 2 pineapple is also not possible.

If count of watermelon is 2: It will cost ₹10 and for remaining ₹28, we can buy 4 pineapple with all amount being utilised. We can buy 4 pineapple along with with 2 watermelon for ₹38.

If count of watermelon is 0: It will cost you ₹0 and for remaining ₹38, we can buy 5 pineapple with ₹3 being not utilised. So 5 pineapple is also not possible.

So the answer is 4 pineapple.
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Pls give two answers for good measure
katrin2010 [14]

Step-by-step explanation: To solve for x in this inequality,

your goal is the same as it would be if you were solving an

equation, to get x by itself on one side.

Since 5 is being subtracted from x, add 5 to both sides of the inequality.

On the left, the -5and +5 cancel out and on the right, -2 + 5 is 3.

So we have x ≥ 3.

When graphing, start with a closed dot at +3 because x is

not just greater than +3, it's equal to it as well.

Then draw an arrow to the right, like I have done below.

8 0
2 years ago
Read 2 more answers
Please help<br> if x = 3 and y=-4 find x2 + y2 and x2 -y2
lions [1.4K]
1. Plug in the 3 in all the x’s that are in the equation:

(3)2 + y2 = for x2 + y2

(3)2 - y2 = for x2 - y2

This would get you for both equations..

6 + y2 = for x2 + y2

6 - y2 = for x2 - y2

2. Now let’s plug in the value of y which is -4:

6 + (-4)2 = for x2 + y2

6 - (-4)2 = for x2 + y2

This would get you for both equations...

-2 = x2 + y2

14 = x2 - y2


Hope this helped, have an awesome day!





6 0
2 years ago
Factorise x squared - 4x
mario62 [17]
X^2= (x-2[root of x])(x+2[root of x])
4 0
3 years ago
Read 2 more answers
1.Each side of a square has a length of 5x. Use your area expression to find the area of the square when x = 2.2 centimeters. Sh
NARA [144]
1. The area is l * w, so just multiply 5x by 5x. Replacing x with 2.2 gets:
(5 * 2.2) * (5 * 2.2)

11 * 11
= 121

So, the area of the square when x = 2.2 centimeters is 121 sq cm.

2. The expression for this equation would be:
6(y + 4)

And using the distributive property on this to get the simplified expression, just multiply both y and 4 by 6.

6 * y + 6 * 4
6y + 24
So, your expression is 6y + 24.

3. For this one, let's make y's value 3.5 instead of 3 1/2 to make it easier to solve.

We just use the above expression to solve.
6 * 3.5 + 6 * 4
21 + 24
= 45

So, the area of the rectangle when y = 3 1/2 is 45 sq in.

4. For this last one, let's use the formula w = A/l to form an expression that will represent the width.

w = 8w + 18/2

Now, let's simplify it by dividing 8w and 18 by 2.
w = 8w/2 + 18/2

w = 4w + 9

So the expression to represent the width of the rectangle is 4w + 9.
Hope this helped!
4 0
3 years ago
This year, Cornell’s class took one more than three times as many field trips as last year’s class. This year, Cornell’s class t
ki77a [65]

Answer:

x is field trips last year

(X x 3) + 1 +t

2

6 0
3 years ago
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