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All that happened was the equation got multiplied by 2

2 ( x^2 + 8x+4)    =    2x^2 + 16x + 8        continue......

If it decreases 9%    there is 91 % left

.91 ( 720) = $...........

Arc RG = 100º      ∠GFR = 1/2 * 100 = 50º

Arc FQ = 28º         ∠FGQ = 1/2 * 28 = 14º

∠FPG = 180 - (50 + 14) = 116º

∠RPG = 180 - ∠FPG = 64º

or

∠RPG = (arc GR + arc FQ) / 2 

∠RPG = (100º + 28º) / 2 = 64º

Angle RPG = (130 + 28)/2 = 79 degrees.

just use fractional exponents and then bash :P

sniiiipeeedddddddddddd

2^5/3  * 2^7/2   /   2^4/6

  = 2 ^{10/6 + 21/6 - 4/6}  = 2 ^27/6  = 2^{4 +1/2}

^{= 16 sqrt 2}

if you want steps: 

break the expression into groups and then just factor out x in the first part into x(x-3) and then factor the seond part into 16(x-3)

now, rewrite it as x(x-3)=16(x-3)

then, find the lcm (or is it gcf) x-3 and factor that out

finally, we get (x-3)(x+16) which is a binomial, so the answer is reasonable

x^2 +10x+7 = 0    Use quadratic fromula     a = 1     b = 10    c = 7

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)     to find x =  -5 +-  3sqrt 2     Pick the smaller one................

The answer is:

\((x-3)(x+16)\)

First, move everything to the left side.

\(x^2+10x+7=0\)

use the binomial theorem to get \(x=-5+3√2, x=-5-3√2\)

The smaller answer is the second one, so that's the answer.

.65 * .42 * 117 000 000 = ............  households

The train takes 3 seconds at 100km to enter the tunnel

3 sec / 3600 sec/hr x 100 km/ hr = 1/12 km long train

or......

The tail (caboose)  of the train takes 3 seconds + 35 seconds  to pass through the tunnel

38 seconds / 3600 sec/hr  x 100 km/hr = 1.0555 km

the train length is  3 out of 38 of this = 3/38 x 1.0555=.08333 km = 1/12 km long

 Here are the answers:

1. 51260

2. Angle D = 150 degrees

3. Jan 31 falls on Friday

4. n = 126

5. Noah drank 4 cans

6. x = 4

8. The units digit is 2.

9. The area of the new rectangle is 2317.

10. It will take 1.5 hours for all three printers.

It is not 1

Good answer, but what about the negative numbers? I think you're missing some positive numbers as well. 

There are great answers here: https://web2.0calc.com/questions/please-help-math-question-please-answer-asap

umm there are no options. 

but let x be the number of people who like pizza and let y be the number of people who don't like pizza and z is the total number of students in the class. 

The equation is x+y=z

Writing out the terms and following the pattern, the remainder of s_{100} when divded by 5 is 1.

https://web2.0calc.com/questions/translate-standard-form-to-slope-intercept-form-or/new

from what I can see here, x=6 and y=3 (or it can be the other way around.)

substitute x and y in the given equation

6^3+3^3 can be simplified to 216+27 which is 243

if you need working, here it is

100%-20%=80%

let's forget the zero for now and do 16/8=2

so 10%=2 students

20% is double 10% so we need to find what is double of 2. 

2*2=4 so 4 girls have blonde hair

16+4=20 total students

https://web2.0calc.com/questions/help-with-java-homework/new

for 30 dogs to 20 cats: 

a) 3/2

b) 1.5

c) for every 3 dogs there are 2 cats

for the orange leaf one: 

a) 4/7

b) 0.571428

c) for every 4 sugar cones orange leaf sells, there are 7 waffle cones

use systems of equations

the two systems are: 

f=9s

f+3=6(s+3)

steps: 

1. expand 6(s+3) to get 6s+18

2. substitute f in terms of s (and we know that f=9s, so then the second equation becomes 9s+3=6s+18

3. now we know how to solve. add -6s to both sides, add -3 to both sides, and finally divide both sides by 3. 

We get: 

f=45, s=5

so the son is 5 years old and the father is 45 years old