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2 years ago

Please help, i need this done asap!

Mathematics

1 answer:

Bond [772]2 years ago

7 0

Answer:

$}\frac{\sqrt{2} }{2}$ or 0.707

Step-by-step explanation:

cos(315) is equivalent to cos ( $\frac{7\pi }{4}$ )

You can look at the unit circle to find the cos value for this. Keep in mind that cos is the x value of the corresponding coordinate.

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Find y Solve the simultaneous equations 3x + 2y = 27 3x - Y = 9

lutik1710 [3]

Answer:

$y = 6$

Step-by-step explanation:

To find $y$ , we need to eliminate $x$ in this system of equations:

$3\cdot x + 2\cdot y = 27$ (1)

$3\cdot x - y = 9$ (2)

From (1) and (2):

$x = \frac{27-2\cdot y}{3}$

$x = \frac{9+y}{3}$

Then, we equalize both expressions and solve for $y$ :

$\frac{27-2\cdot y}{3} = \frac{9+y}{3}$

$27-2\cdot y = 9 + y$

$3\cdot y = 18$

$y = 6$

6 0

2 years ago

a beverage is made by mixing 3 parts of water with 5 parts of fruit juice how many parts of water are mixed with 1 part on fruit

Fittoniya [83]

Answer:

$\frac{3}{5}=0.6$

Step-by-step explanation:

Given the initial ratio of 3 parts water to 5 parts fruit juice, you can set up a proportion (equivalent ratios) to determine the amount of water needed with just 1 part of fruit juice:

$\frac{water}{fruit}=\frac{3}{5}=\frac{x}{1}$

cross multiply: 5x = 3

divide: 5x/5 = 3/5 or x = 3/5

3/5 = 0.6 parts water

7 0

2 years ago

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Find the y-intercept of the line -4× - 2y =16

Oksi-84 [34.3K]

Answer:

The y intercept is (0,-8)

Step-by-step explanation:

To find the y intercept, set x = 0 and solve for y

-4x -2y = 16

-4(0) -2y =16

-2y = 16

Divide by -2

-2y/-2 = 16/-2

y = -8

The y intercept is (0,-8)

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2 years ago

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garik1379 [7]

1. m∠1 + m∠2 = 180°

2. Definition of bisector

3. m∠1 + m∠3 = 180°

4. Substitution Property of Equality

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2 years ago

True or False: A square is a specific type of parallelogram?

sergejj [24]

False, they are both quadrilaterals though.

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2 years ago

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