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3 years ago

Help me with this plzz i really need this

Mathematics

1 answer:

fgiga [73]3 years ago

3 0

Step-by-step explanation:

19. 4n-7+3n-1= 7n - 8 c is the answer

20. the prime factors are 2*3*5*7*11=2310. the answer is c

21. 3x-8x-10=x+2

-5x - 10 = x + 2

-6x - 10 = 2

-6x = 12

x = -2 ( the answer is b)

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In y intercept form m=2 through (4,7)

Lynna [10]

Answer:

$1.\ y = 2x - 1$

$2.\ y = -4x + 5$

Step-by-step explanation:

Solving (1): The line equation in y intercept form;

Given

$m = 2$

$(x_1,y_1) = (4,7)$

This is calculated using the following formula

$y - y_1 = m(x - x_1)$

Substitute values for m, x1 and y1

$y - 7 = 2(x - 4)$

Open Bracket

$y - 7 = 2x - 8$

Make y the subject

$y = 2x - 8 + 7$

$y = 2x - 1$

Solving (2): The line equation in y intercept form;

Given

$m = -4$

$(x_1,y_1) = (-1,9)$

This is calculated using the following formula

$y - y_1 = m(x - x_1)$

Substitute values for m, x1 and y1

$y - 9 = -4(x - (-1))$

$y - 9 = -4(x + 1)$

Open Bracket

$y - 9 = -4x - 4$

Make y the subject

$y = -4x - 4 + 9$

$y = -4x + 5$

5 0

2 years ago

(a) find the slope m of the tangent to the curve y = 5/ x at the point where x = a > 0.(b) find equations of the tangent line

Trava [24]

(a) the slope of curve is calculated from the derivative of the curve expression y=5/x. In this problem, the slope m=-5/(a^2). (b) x=1, y=5ďĽŚand m=-5, the tangent line is y-5=-5*(x-1). x=4, y=5/4, and m=-5/16, the tangent line is y-5/4=-5/16*(x-4)

4 0

2 years ago

6/27 simplified plz i need help

Taya2010 [7]

Answer:

The answer should be 2/9

6 0

2 years ago

70° 13 ४ c= 12.2 x A

Aleonysh [2.5K]

Answer:

sin70=13/x