3 years ago

You have some trading cards. You give 21 cards to a friend and have 9 left for yourself.

Mathematics

1 answer:

Evgesh-ka [11]3 years ago

8 0

Answer:

Step-by-step explanation:

21 + 9 = 30

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You plant a rectangular rose garden along the side of your garage. You enclose 3 sides of the garden with 40 feet of fencing. Th

solmaris [256]

Let's assume

length of rectangle =L

width of rectangle =W

You enclose 3 sides of the garden with 40 feet of fencing

so, we get

$L+2W=40$

now, we can solve for L

$L=40-2W$

we know that

area of rectangle is

$A=L*W$

$100=L*W$

now, we can plug

$100=(40-2W)*W$

now, we can solve for W

$-2W^2+40W-100=0$

we can use quadratic formula

$W=\frac{-40+\sqrt{40^2-4\left(-2\right)\left(-100\right)}}{2\left(-2\right)}$

$W=\frac{-40-\sqrt{40^2-4\left(-2\right)\left(-100\right)}}{2\left(-2\right)}$

we can take anyone value ..because both are giving positive value

first dimensions:

$W=2.929$

now, we can find L

$L=40-2*2.929$

$L=34.142$

so, length is 34.142feet

width is 2.929 feet

Second dimensions:

$W=17.071$

now, we can find L

$L=40-2*17.071$

$L=5.858$

so, length is 5.858feet

width is 17.071 feet

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3 years ago

If y varies directly as x and y = 144 when x = 12, what is the value of y when x = 17?

olasank [31]

Direct variation:
$y=kx$

y=144 when x=12.
$144=12k \\ k=\frac{144}{12} \\ k=12$

y=? when x=17.
$y=12 \times 17 \\
y=204$

y=204 when x=17.

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3 years ago

$50. MP3 downloads cost $1.5 each. How many songs can he download<br> and still have $12

Stella [2.4K]

25 songs he can download

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3 years ago

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For what values of x will the polynomial P(x)=-2x^3 +cx^2-5x+2 have the same remainder when it is divided by x-2 and x+1

andriy [413]

Answer:

Step-by-step explanation: need more

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3 years ago

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4 years ago