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serg [7]
2 years ago
11

Rafael is wrapping presents for his sister's birthday party, but he is unsure how many feet of wrapping paper is left on the rol

l. It takes 1.3 feet of wrapping paper to wrap each gift.
If Rafael has a total of P feet of wrapping paper on the roll, which of the following expressions represents the number of presents he can wrap?
ANSWERS
A.
1.3 ÷ P
B.
1.3 × P
C.
P - 1.3
D.
P ÷ 1.3
Mathematics
1 answer:
yarga [219]2 years ago
8 0
The answer is B/1.3 x P
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NO LINKS!!!!!
8090 [49]

9514 1404 393

Answer:

  5x^2 +10x = -5

Step-by-step explanation:

The equation will have one solution when the discriminant is zero.

In standard form, the equation is ...

  ax^2 +10x -c = 0

The discriminant of the equation ax^2+bx+c=0 is  ...

  b^2 -4ac

so the discriminant of your equation is ...

  10^2 -4a(-c) = 100 +4ac

We want that to be zero, so we require ...

  100 +4ac = 0

  25 +ac = 0

  ac = -25

Any pair of values of 'a' and 'c' that have a product of -25 will satisfy the requirement. As you state, one possible pair is a = 5 and c = -5. Putting these values into the given equation makes it ...

  5x^2 +10x = -5 . . . . . the equation with a=5, c=-5

_____

<em>Additional comment</em>

Your problem statement does not require that 'a' be non-zero. If <em>a=0</em>, then the equation will have one real solution for <em>any value of c</em>.

If you restrict the solutions to integers, then possibilities include ...

  (a, c) = (1, -25), (5, -5), (25, -1), (-25, 1), (-5, 5), (-1, 25)

6 0
2 years ago
PLZZZ HELPPP THIS IS DUE!!
allochka39001 [22]

Answer:

y=3x-2..... i

x-y=4...... ii

x-4=y

Substituting the value of y in equation i,

x-4=3x-2

2-4=3x-x

-2=2x

x=-1.

From ii,

-1-4=y

y=-5.

x=-1, y=-5

Step-by-step explanation:

brainest please

7 0
3 years ago
Which is equivalent?
attashe74 [19]

Answer:

the answer is -8

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Describe and correct the error made in finding the product. <br><br> Please explain what's wrong
qaws [65]
Okay, it's wrong because they forgot to do -2 times 3x.
The correct answer is 3^{2} -2x-8
Hope i got is correct!
5 0
3 years ago
Solve for n: 21 K - 3n + 9 p is greater than 3 p + 12
Digiron [165]

Answer:

n > p + 1 + 7k

Step-by-step explanation:

21k - 3n + 9 > 3p + 12

21k - 3n > 3p + 12 - 9

3n > 3p + 3

3n > 3p + 3 + 21k

n > (3p + 3 + 21k)/3

n > p + 1 + 7k

6 0
3 years ago
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