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3 years ago

Simplify each expression 2x-5y. If x=2/3 and y=1/4

Mathematics

2 answers:

Anon25 [30]3 years ago

7 0

Answer:

$\frac{1}{12}$

Step-by-step explanation:

$2x-5y=\\\\2(\frac{2}{3})-5(\frac{1}{4})=\\\\\frac{4}{3}-\frac{5}{4}=\\\\\frac{16}{12}-\frac{15}{12}=\\\\\frac{1}{12}$

Hatshy [7]3 years ago

4 0

Answer:

1/2

Step-by-step explanation:

2x - 5y

2(2/3) - 5(1/4)

(2/1 x 2/3) - (5/1 x 1/4)

(4/3) - (5/4)

(4/3 x 4/4) - (5/4 x 3/3)

16/12 - 15/12

1/12

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Are 4(5+x) and (5+4)+x equal

SSSSS [86.1K]

Answer:

No, they are not equal

Step-by-step explanation:

If x = 1

4(5+x) = 4(5+1) = 4 x 6 = 24

(5+4) + x = 9 +1 = 10

24 $\neq$ 10

3 0

3 years ago

I really need help quick

Natali [406]

Answer:

$\sf x=2+\sqrt{6},\:x=2-\sqrt{6}$

Explanation:

$\sf y = x^2 -4x$

given that y = 2

$\sf x^2 -4x = 2$

$\sf x^2 -4x -2 = 0$

using quadratic formula:

$\sf x = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{2a} \ \ \ when \ ax^2 + bx + c = 0$

$\rightarrow \sf x_{1,\:2}=\dfrac{-\left(-4\right)\pm \sqrt{\left(-4\right)^2-4\cdot \:1\cdot \left(-2\right)}}{2\cdot \:1}$

$\rightarrow \sf x_1=\dfrac{-\left(-4\right)+2\sqrt{6}}{2\cdot \:1},\:x_2=\dfrac{-\left(-4\right)-2\sqrt{6}}{2\cdot \:1}$

$\rightarrow \sf x=2+\sqrt{6},\:x=2-\sqrt{6}$

in decimals:

$\rightarrow \sf x=4.45 , \ -0.45$

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2 years ago

Solve the equation: 2x=4

nekit [7.7K]

Answer:

x=2

Step-by-step explanation:

2x=4

x=4/2

x=2

4 0

3 years ago

Read 2 more answers

I need the answer for number 10 please!

Vera_Pavlovna [14]

Answer:

3x + 4y = 833

6x + 4y = 1058

II - I

3x = 225 --> x = 75

3*75 + 4y = 833 --> y = 152

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3 years ago

Round to nearest whole number

diamong [38]

Answer:40

Step-by-step explanation: If she got two turnips for 1$, that means that each turnip if 50¢. So you will be able to buy 40 turnips with 20$

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3 years ago