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3 years ago

#1 : 4x-18=3x+2? #2 : 5y-7+4x-18?

Mathematics

1 answer:

slava [35]3 years ago

5 0

Step-by-step explanation:

4x-18=3x+2

4x-3x=12+18

x=12+18

x=30

5y-7+4x-18

5y-25+4x

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3(-5)(-1)(-2) evaluate please thank you :D

user100 [1]

Answer:

-30

Step-by-step explanation:

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3 years ago

Read 2 more answers

What is the smallest positive integer that has 12 factors

Umnica [9.8K]

Answer:

1,2,3,4,5,6,10,12,15,20,30,60

Step-by-step explanation:

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3 years ago

Find the angle between the given vectors to the nearest tenth of a degree.

saul85 [17]

Answer:

Step-by-step explanation:

Given

u = <6, -1>

u = 6i-j

and

v=<7,-4>

v=7i-4j

The formula for angle is:

Let x be the angle

$cos\ x = \frac{u.v}{||u||.||v||}$

where ||u|| is the length and u.v is the dot product or scalar product of both vectors

So,

$||u|| = \sqrt{(6)^2+(-1)^2}\\ = \sqrt{36+1}\\ = \sqrt{37}\\ ||v||=\sqrt{(7)^2+(-4)^2}\\ = \sqrt{49+16}\\ = \sqrt{65}\\$

$u.v = u_1u_2+v_1v_2\\= (6)(7)+(-1)(-4)\\=42+4\\=46$

$cos\ x=\frac{46}{\sqrt{37}\sqrt{65}} \\= \frac{46}{\sqrt{2405} }\\Can\ also\ be\ written\ as:\\= \frac{46}{\sqrt{2405} } * \frac{\sqrt{2405} }{\sqrt{2405}} \\=\frac{46\sqrt{2405} }{2405}$

The calculated angle will be in radians. To find the angle in degrees:

$x = \frac{180}{\pi} cos^{-1} (\frac{46\sqrt{2405} }{2405})\\x = 20.282\\x= 20.3\\$

Hence Option A is correct ..

6 0

4 years ago

Y/2 = ? Y=102 helpp?

Alex Ar [27]

Answer is Y/2=51

We start with Y=102

We can plug 102 into the equation Y/2=?

We get 102/2=?

102/2=51.

Therefore, Y/2=51

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3 years ago

I need help please Write an equation in slope intercept form for the following graph.

olganol [36]

Answer:

y = - 0.5x + 3

Step-by-step explanation:

Take two points on the line:

(0, 3) and (2, 2)

The slope-intercept form:

y = mx + b, where m- slope, b- y-intercept

Find the slope:

m = (2 - 3) / (2 - 0) = - 1 / 2 = - 0.5

The y- intercept is b = 3 according to the first point.

The line is:

y = - 0.5x + 3

3 0

2 years ago