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3 years ago

The mass of a gold atom is 3.29 x 10-22 grams. The mass of a helium-4 atom is

Mathematics

1 answer:

blondinia [14]3 years ago

7 0

Answer:

um, I checked the questions you asked and we have the same questions, I think we might be in the same school lol

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The equation A = x(x - 7) describes the area, A, of a rectangular flower garden, where x is the width in feet.

mamaluj [8]

x(x-7)=8

x^2-7x-8=0

(x-8)(x+1)=0

so x=8 (and -1 but width can’t be negative)

So your answer is C. 8

8 0

3 years ago

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Lena [83]

A circle is 360°. Since you only have 3 different types of weather, if you split the ° equally, each section would have 120°. The amount of rainy days is 10/30 or exactly 1/3, so 120° are rainy days.

If you do 30 x 12, it equals 360. So that means that each day is 12°. There were 8 cloudy days, so you can do 8 x 12 = 96°

5 0

3 years ago

7. Manuel buys his grandmother a bunch of flowers for $12.95 and buys some candy for his mother for $2.76. If he has $7.83 left,

xxMikexx [17]

Answer:

$23.54

Step-by-step explanation:

12.95+2.76+7.83=23.54

7 0

3 years ago

Read 2 more answers

4n^(2)+4n=3 Please help with the work

Kaylis [27]

Answer:

n= 1/2 ( $\frac{1}{2}$ ) or (0.5)

AND

n= -3/2 ( $-\frac{3}{2}$ ) or (-1.5)

Step-by-step explanation:

4n^2+4n=3

step1: move 3 to the other side and make the equation equal to zero.

4n^2+4n-3=0

step2: factorise the equation.

(2n-1)(2n+3)=0

step3: make each bracket equal to zero.

2n-1=0

2n+3=0

step4: solve for n values.

1. 2n-1=0

(add 1 for both sides)

2n=1

(divide by 2 for both sides)

n= 1/2 ( $\frac{1}{2}$ ) or (0.5)

2. 2n+3=0

( subtract 3 for both sides)

2n=-3

(divide by 2 for both sides)

n= -3/2 ( $-\frac{3}{2}$ ) or (-1.5)

3 0

3 years ago

Is this correct? #2 Please check

julsineya [31]

Yes you are correct!

you first have to get rid of the number next to the variable m. so you have to subtract 9 to get rid of the variable. then you subtract 9 from both sides and get that answer.

4 0

3 years ago