What two numbers add up to 1 but multiply to -30

Answers

Answer 1

Answer: $x;\ y-the\ numbers\n\n \left\{\begin{array}{ccc}x+y=1&\to x=1-y\nxy=-30\end{array}\right\n\nsubtitute\ x=1-y\ to\ second\ equation:\n\n(1-y)y=-30\ny-y^2+30=0\n-y^2+y+30=0\ \ \ \ \ |change\ signs\ny^2-y-30=0\ny^2-6y+5y-30=0\ny(y-6)+5(y-6)=0\n(y-6)(y+5)=0\iff y-6=0\ or\ y+5=0\n\Downarrow\ny=6\ or\ y=-5$

$x=1-y\n\nfor\ y=6\Rightarrow x=1-6=-5\n\nfor\ y=-5\Rightarrow x=1-(-5)=1+5=6\n\n=======================================\nAnswer:\boxed{6}\ and\ \boxed{-5}$

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janna jumoed 156 inches in the long jump competition at the high school track meet how many feet did janna jump

Answers

Janna jumped 13 feet. 156 /12= 13

Janna jumped 13 feet.

John had a watermelon with a mass of 3 kilograms. complete the bar model. then write the mass of the watermelonin grams.

Answers

3000 is 3 kilograms in grams

Answer:

Isaiah has a watermelon with a mass of 3 kilograms

Amelia uses 6 patches of fabric per square foot to make a blanket. How many patches of fabric will she need to make a blanket that is 720 square inches?

Answers

4,320 because if you take 720 and multiply it by 6 you get your answer

PLEASE Help this is due today

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B. 3
—-
11 775 x b- 6

Yuh!!

I’m pretty sure the correct answer is B

A punch recipe calls for 3 pints of orange juice does the recipe How many ounces oof oranges juice does it requirew

Answers

16 fl oz = 1 pint
16 x 3
48
48 fl oz = 3 pints

What's the answer witch ones r composite 14 15
16 17 18 19
20
21

Answers

A composite number is a number with more than 2 factors and 16, 18, 20, and 21 are composite.

14 and 15 are also composite:

14 - 1×14, 2×7
15 - 1×15, 3×5

the first person probably didn't see the first row of numbers