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Mathematics

1 answer:

Anna35 [415]3 years ago

5 0

Off the top of my head i can tell that B) 3 and A) -1 are two possible roots, you can plug it into a calculator and situate put if there is more

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Evaluate the expression. 4(x+8)for x =6

Nitella [24]

Answer: 56

Step-by-step explanation:

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2 years ago

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2 years ago

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andrey2020 [161]

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3 years ago

Q8 Q3.) Solve the system by the substitution method.

inn [45]

Recall that $(x+y)^2=x^2+2xy+y^2$ . So we can add twice the first equation to the second one to get

$x^2+y^2+2xy=10+2\cdot3\iff(x+y)^2=16\implies x+y=\pm4$

Since $xy=3$ , we have $y=\dfrac3x$ $(x\neq0)$ so

$x+y=x+\dfrac3x=\pm4\implies x^2\mp4x+3=0$

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2 years ago

The perimeter of a rectangle is 250 inches. if the length is 4 times as big as the width, what is the length and width of the re

yarga [219]

The length and width of the rectangle are 7.90 inches and 31.6 inches respectively

It is given that,

Let the length of the rectangle = l

Let the width of the rectangle = w

The perimeter of the rectangle = 250 inches

l x w = 250 ....eq 1

Then,

Length is 4 times as big as width