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lidiya [134]
3 years ago
14

Solve x2 − 10x = −21. (6 points)

Mathematics
2 answers:
Svetllana [295]3 years ago
4 0

The CORRECT answer is::

x = -3 and x = -7


WORK::

Move ALL terms to the left side and set equal to zero. Then set each factor equal to zero.

nata0808 [166]3 years ago
4 0

Answer:

x= 7,3

Step-by-step explanation:

-Let's solve your equation step-by-step.

x^2−10x=−21

-Step 1: Subtract -21 from both sides.

x^2−10x−(−21)=−21−(−21)

x^2−10x+21=0

-Step 2: Factor left side of the equation

(x−3)(x−7)=0

-Step 3: Set factors equal to 0.

x−3=0 or x−7=0

= =

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DanielleElmas [232]
There are mnemonic acronyms out there for reminding you how to do this. I think of it simply as using the distributive property.
  (4x-3)(x+5) = 4x(x+5) -3(x+5)
then again
  = (4x² +20x) + (-3x -15)
  = 4x² + (20-3)x -15 . . . . . . . combine like terms
  = 4x² +17x -15
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3 years ago
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What is the slope of the line that contains the points (4, –4) and (7, –6)?
labwork [276]
The slope is m=-2/3 you are welcome




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3 years ago
The sale price of an item on sale for 40% off is $48. What was the regular price?
Charra [1.4K]

Good evening ,

<u><em>Answer:</em></u>

<h2>the regular price of the item is $80.</h2>

<u><em>Step-by-step explanation:</em></u>

Let p represent the regular price of the item.

p - p×(40/100) = 48 ⇌ p×(1 - 40/100) = 48 ⇌ p×(100/100 - 40/100) = 48

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Item 8 The nutrition facts label on a container of dry roasted cashews indicates there are 161 calories in 28 grams. You eat 9 c
lakkis [162]
Hey there,
Since your question is not clear, i could only come up with a few possibilities of what you are asking.
1) Weight of 1 cashew
9 cashew = 12 grams
1 cashew = 12 / 9
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2) Calories per gram
28 grams = 161 calories
1 gram = 161 / 28 
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Hope this helps :))

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Gwar [14]

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