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3 years ago

3x-x+7=-15 three x(variable) minus x (variable) plus seven equals negative 15 please solve

Mathematics

1 answer:

frutty [35]3 years ago

5 0

So combine like terms and solve for x
2x=-22
X=-11

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What is the value of A shown in the equation? 7 x 9 = (1 x 10)-(7 x A)

Aneli [31]

Answer:

A= -53/7

Step-by-step explanation:

1 x 10 -1 x 7 x A=7 x 9

10-7A =7 X 9

10-7A=63

-10 -10

-7A=53

A= -53/7

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3 years ago

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Which is greater 2thousandths + 4 hundreths or 0.036

Triss [41]

The answer is 2 thousands plus 4 hundreths.

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3 years ago

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Raven can walk 2 2/5 miles in 3/5 hour. At this rate, how far can she walk in 1 hour? You might want to change 2 2/5 to an impro

elena55 [62]

The distance traveled by Raven in 1 hour at the given rate is 4.0 miles.

The given parameters:

Distance traveled by Raven = 2 2/5 miles
Time of motion, t = 3/5 hour

The speed of Raven motion is calculated as follows;

$V = \frac{Distance}{Time} \\\\V = Distance\ \times \ \frac{1}{Time} \\\\V = 2\frac{2}{5} \ miles \ \ \times \ \ \frac{1}{3/5 \ hr} \\\\V = \frac{12}{5} \ miles \ \ \times \ \ \frac{5}{3 hr} \\\\V = 4 \ mph$

The distance traveled by Raven in 1 hour at the given rate is calculated as follows;

$D = 4 \times 1\\\\D = 4 \ miles$

Learn more about rate and distance here: brainly.com/question/1090517

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3 years ago

2x^2+3x-2, a=0 How do I find the derivative?

Ghella [55]

You can use the definition:

$\displaystyle f'(x) = \lim_{h\to0}\frac{f(x+h)-f(x)}h$

Then if

$f(x) = 2x^2+3x-2$

we have

$f(x+h) = 2(x+h)^2+3(x+h) - 2 = 2x^2 + 4xh+2h^2+3x+3h-2$

Then the derivative is

$\displaystyle f'(x) = \lim_{h\to0}\frac{(2x^2+4xh+2h^2+3x+3h-2)-(2x^2+3x-2)}h \\\\ f'(x) = \lim_{h\to0}\frac{4xh+2h^2+3h}h \\\\ f'(x) = \lim_{h\to0}(4x+2h+3) = \boxed{4x+3}$

I'm guessing the second part of the question asks you to find the tangent line to f(x) at the point a = 0. The slope of the tangent line to this point is

$f'(0) = 4(0) + 3 = 3$

and when a = 0, we have f(a) = f (0) = -2, so the graph of f(x) passes through the point (0, -2).

Use the point-slope formula to get the equation of the tangent line:

y - (-2) = 3 (x - 0)

y + 2 = 3x

y = 3x - 2

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3 years ago

ANSWER !! ILL GIVE 40 POINTS !! DONT SKIP :(( PLUS BRAINLIEST !

Likurg_2 [28]

Answer:

Step-by-step explanation:

10x13=130, 9x5=45, 130-45=85

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3 years ago