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3 years ago

A 4.5 pound of apples costs $22.50. how many pounds for a dollar?

Mathematics

2 answers:

nadezda [96]3 years ago

6 0

0.2 pounds as 4.5 / 22.5 = 0.2

AnnyKZ [126]3 years ago

4 0

Answer:

.2 lbs

Step-by-step explanation:

4.5/22.5

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3 years ago

the dance team is selling shirts for 12$ each. the dance team made a total of 288$ with all of the tshirts they sold, which equa

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Answer:

Step-by-step explanation:

Divide 288 by 12

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3 years ago

if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is .....a.2 b.-2 c 1/2 d.none

blsea [12.9K]

Answer:

k=2

Problem:

if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is ..

Step-by-step explanation:

Since the coefficient of x^2 is 1, we can use this identity to aid us: x^2+bx+(b/2)^2=(x+b/2)^2.

So we want the following:

[(k+2)/2]^2=2k

Apply the power on the left:

(k+2)^2/4=2k

Multiply both sides by 4:

(k+2)^2=8k

Expand left side:

k^2+4k+4=8k *I used identity (x+c)^2=x^2+2xc+c^2

Subtract 8k on both sides:

k^2-4k+4=0

Factor using the identity mentioned a couple lines above:

(k-2)^2=0

Since zero squared is zero, we want k-2=0.

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3 years ago

Liam and his twin sister, Lexi, are frosting cupcakes for a school bake sale. Liam frosts 8 vanilla cupcakes and 16 chocolate cu

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3 years ago

Find: (6m5 + 3 – m3 – 4m) – (–m5 + 2m3 – 4m + 6)

belka [17]

Given:

The expression is:

$(6m^5+3-m^3-4m)-(-m^5+2m^3-4m+6)$

To find:

The resulting polynomial in standard form.

Solution:

We have,

$(6m^5+3-m^3-4m)-(-m^5+2m^3-4m+6)$

Write subtraction of a polynomial expression as addition of the additive inverse.

$(6m^5+3-m^3-4m)+(m^5-2m^3+4m-6)$

Rewrite terms that are subtracted as addition of the opposite.

$6m^5+3+(-m^3)+(-4m)+m^5+(-2m^3)+4m+(-6)$

Group like terms.

$[6m^5+m^5]+[3+(-6)]+[(-m^3)+(-2m^3)]+[(-4m)+4m]$

Combine like terms.

$7m^5+(-3)+(-3m^3)+0$

On simplification, we get

$7m^5-3-3m^3$

Write the polynomial in standard form.

$7m^5-3m^3-3$

Therefore, the required polynomial in standard form is $7m^5-3m^3-3$ .

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3 years ago