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3 years ago

Help for 10 points!!

Mathematics

1 answer:

Artyom0805 [142]3 years ago

6 0

Answer:

(D) 10x² +2x - 9

Step-by-step explanation:

3x² + 2x - 5

+ 7x² - 4

10x² +2x - 9

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What is the solution to the linear equation? 4b + 6 = 2 – b + 4

Reil [10]

Answer:

$\large\boxed{b=0}$

Step-by-step explanation:

$4b+6=2-b+4\qquad\text{combine like terms}\\\\4b+6=(2+4)-b\qquad\text{add}\ b\ \text{to both sides}\\\\5b+6=6\qquad\text{subtract 6 from both sides}\\\\5b=0\qquad\text{divide both sides by 5}\\\\b=0$

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3 years ago

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What is the solution to 2x2+8x=x2-16? O x=4 O x=-2 O x=2 O x=4

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Answer:

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Step-by-step explanation:

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zalisa [80]

Answer:

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b. (x+7)^2 = (x+1)^2

Step-by-step explanation:

So the term "a number" is always going to be x. input x into the sentences. "X plus five, then squared, is forty-nine". when they do "is __", that means equal to. In the second question, seven more than x is x + 7 (the two numbers are interchangeable here). Equivalent also means equal. hope this helped :)

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What are the roots of a quadratic equation?

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4 years ago

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noname [10]

Answer:

$8.51x10^{-3}cm$

Step-by-step explanation:

In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent. In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3. In order to add them, we can move the decimal over for the body cell diameter:

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Add the two values: $0.51x10^{-3}+8x10^{-3}=8.51x10^{-3}cm$

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