3 years ago

Which graph represents the equation y=2x-1?

Mathematics

1 answer:

lianna [129]3 years ago

6 0

D is the answer. You go two -1 up 2 and over one to the negative side.

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Equation is equivalent to 4x-2=30

expeople1 [14]

The answer is x=8 your welcome

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3 years ago

If f(x) = 7 (x-1) + 8 , what is the value of f (1)

Flauer [41]

Answer:

f(1) = 8

Step-by-step explanation:

Step 1: Define

f(x) = 7(x - 1) + 8

f(1) = x = 1

Step 2: Substitute and evaluate

f(1) = 7(1 - 1) + 8

f(1) = 7(0) + 8

f(1) = 8

5 0

3 years ago

Please solve this proportion with steps (I'm stuck) (9x+6)/18= (20x+4)/3x

guapka [62]

$\frac{9x+6}{18}=\frac{20x+4}{3x}$

Cross multiply. Distribute...
$3x(9x+6)=18(20x+4)\\27x^2+18x=360x+72\\27x^2-342x-72=0\\3x^2-38x-8=0$

OH GOD IT'S A QUADRATIC
(our equation is in ax² + bx + c = 0 form. a=3. b= -38. c= -8.
plug these values into the quadratic formula and simplify.)
$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-(-38)\pm\sqrt{(-38)^2-4(3)(-8)}}{2(3)}=\frac{38\pm\sqrt{1444+96}}6\\\\\sqrt{1444+96}=\sqrt{1540}=\sqrt{4\times345}=2\sqrt{345}\\\\\frac{38\pm2\sqrt{345}}6=\boxed{x=\frac{19\pm\sqrt{345}}3}$

Approximate values for x: -0.20714 or 12.874

7 0

3 years ago

Read 2 more answers

Which property is used in the statement?

antiseptic1488 [7]

The anwser is b,symmetric property(:

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4 years ago

Eric biked 1 kilometer 125 meters on Monday. on Tuesday, he biked 375 meters less than on Monday how far did he bike both days

diamong [38]

1 km 125m = 1125 meter on Monday
1125-375=750 meter on Tuesday

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3 years ago