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3 years ago

Anybody know how to do this

Mathematics

2 answers:

VladimirAG [237]3 years ago

5 0

Answer:

See explanation below

Step-by-step explanation:

Plug in each x value into the equation to calculate the y value.

a) 2x + 3y = 6

x = 0, y = 2

x = 1.5, y = 2/3

x = 3, y = 0

b) y + 2x = 0

x = -1, y = 2

x = 0, y = 0

x = 2, y = -4

c) x - 2y = 0

x = 0, y = 0

x = 2, y = 1

x = 4, y = 8

d) 3x - y = 3

x = 0, y = -3

x = 1, y = 0

x = 2, y = 3

ICE Princess25 [194]3 years ago

3 0

Answer:

$y = 2$

$y = 4$

$y = 8$

$y = 2$

$y = 3$

$y = 6$

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PLZZZ HELP will mark brainliest!

erica [24]

Answer:

(3,8): No, (-1,-11): Yes, (2,7): Yes, (0,-6): No

Step-by-step explanation:

Basically, you just substitute x and y with the numbers given.

18x - 3y = 15

y = 6x - 5

(3,8):

18(3) - 3(8) = 15

54 - 24 = 30 It is not equal to 15, so it does not work.

y = 6x - 5

8 = 6(3) - 5

8 = 13 It is not equal to 8, so it does not work.

Therefore, (3,8) is not a solution.

Try this for every pair and you will find that (-1,-11) and (2,7) are solutions.

I hope this helps!

8 0

2 years ago

1. The prism-shaped roof has equilateral triangular bases. Create an equation that models the height of one of the roof's triang

lana66690 [7]

Answer:

$h=\frac{\sqrt{3}}{2}b\ units$

Step-by-step explanation:

we know that

An equilateral triangle has three equal sides and three equal interior angles (the measure of each interior angle is equal to 60 degrees)

see the attached figure to better understand tyhe problem

Let

h ----> the height of an equilateral triangle

b ---> the length side of an equilateral triangle

In the right triangle ABD

Applying the Pythagorean Theorem

$AB^2=AD^2+BD^2$

substitute the given values

$b^2=(\frac{b}{2})^2+h^2$

$b^2=\frac{b^2}{4}+h^2$

$h^2=b^2-\frac{b^2}{4}$

$h^2=\frac{3}{4}b^2$

square root both sides

$h=\frac{\sqrt{3}}{2}b\ units$

7 0

2 years ago

A circle has a radius of 8cm. An angle of 1.4 radians is subtended at the center by an arc. Calculate the length of the arc

AURORKA [14]

Answer:

11.2 cm

Step-by-step explanation:

Given that;

Arc Length Formula (if θ is in radians): l = ϴ × r

ϴ = angle subtended in radians

r= radius of the circle

l = 8cm × 1.4 radians

l= 11.2 cm

5 0

2 years ago

Find the value of x

Sunny_sXe [5.5K]

Answer:

19.1

Step-by-step explanation:

Let's assign some variables to this triangle.

angle A = 63°

angle B = unknown

angle C = 71°

side a = 18

side b = y

side c = x

By the law of sins, applicable to ALL triangles, we have:

$\frac{sin(A)}{a} = \frac{sin(B)}{b} = \frac{sin(C)}{c}$

Let's then take the equation for angles A and C, in order to isolate the c (which is our x to find).

we then have

$c = \frac{sin(C) * a}{sin(A)} = \frac{sin(71) * 18}{sin(63)} = 19.10$

So, the answer is the second one.

7 0

2 years ago

Read 2 more answers

Evaluate the expression. (25+11)×(10−(−3)

Tom [10]

Answer:

468

Step-by-step explanation:

25+11=36 x (10+3)

36 x 13= 468

8 0

2 years ago

Anybody know how to do this ​

Anybody know how to do this