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3 years ago

Trigonometry pile up

Mathematics

1 answer:

nlexa [21]3 years ago

4 0

Where is the question ?

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The ratio x:y is equal to 2:3 express x in terms of y

choli [55]

Answer:

x = $\frac{2}{3}$ y

Step-by-step explanation:

Given x : y = 2 : 3

Express the ratios as a fraction, that is

$\frac{x}{y}$ = $\frac{2}{3}$ ( cross- multiply )

3x = 2y ( divide both sides by 3 )

x = $\frac{2}{3}$ y

7 0

3 years ago

Read 2 more answers

What are the exact solutions of x2 + 5x + 1 = 0? (5 points)

Rus_ich [418]

Answer:

$x=\frac{-5\pm\sqrt{21} }{2}$

Step-by-step explanation:

We use the quadratic formula here which says for a quadratic equation $ax^2+bx+c=0$ .

$x= \frac{-b\pm\sqrt{b^2-4ac} }{2a}$

Now in our case

$a=1\\b=5\\c=1$

so we have:

$x=\frac{-5\pm\sqrt{5^2-4(1)(1)} }{2(1)} =\frac{-5\pm\sqrt{21} }{2}$

$\boxed{x=\frac{-5\pm\sqrt{21} }{2} }$

Which are our solutions.

7 0

3 years ago

Solve the system of equations by substitution. What is the product of x and y from the solution? 2x + 3y = 12 5x − y = 13

Darina [25.2K]

2x + 3y = 12 (1st)

5x − y = 13 (2nd) ---> y = 5x - 13

Substitute y = 5x - 13 into (1st) equation

2x + 3(5x - 13) = 12

2x + 15x - 39 = 12

17x - 39 = 12

17x = 51

x = 3

substitute x = 7 into y = 5x - 13

y = 5x - 13

y = 5(3) - 13

y = 15 - 13

y = 2

Answer

solution x = 3 and y = 2

5 0

3 years ago

What is the value of<br> 83 + 5x, when x = 12?

liq [111]

Answer:143

Step-by-step explanation:

143

3 0

3 years ago

Read 2 more answers

I need help ASAP Right answers only!!

madam [21]

9514 1404 393

Answer:

see attached

Step-by-step explanation:

The graph has a line with a slope of 1/2 beginning at the origin and extending as far as you like into the first quadrant.

8 0

3 years ago