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2 years ago

Can someone help me?

Mathematics

1 answer:

MariettaO [177]2 years ago

7 0

I hope this helps you

x.3x+x.(-1)+5.3x+5.(-1)-(x^2-2.4.x+16)

3x^2-x+15x-5-x^2+8x-16

2x^2+22x-21

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A coordinate grid with a line labeled negative 3 x plus StartFraction one-half EndFraction y equals negative 3 and passes throug

tensa zangetsu [6.8K]

Answer: C

Step-by-step explanation:

Given that the line -3x + y/2 = -3 passes through the points (1, 0) and (0, -6).

First rearrange the equation

-3x + y/2 = -3

Y = 2( 3x - 3 )

Y = 6x - 6 ..... (1)

Also, the slope of points (1, 0) and (0, -6). Will be

M = ( -6 - 0 )/( 0 - 1 )

M = -6/-1

M = 6

Using general linear equation

Y = MX + C

Let Y = 0 and X = 1

0 = 6(1) + C

C = -6

Substitutes C back into the equation

Y = 6x - 6 ...... (2)

The value of b that will cause the system to have infinitely many number of solutions is 6

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2 years ago

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The transportation department has to put a railing along the outer curve of this road. The road is 20 feet wide. What is the len

Dovator [93]

From my research, the image attached supports the problem. Since only the outer curve is to be solved for, the formula for arcs can be used.

s = theta*radius

where s = arc length = outer curve

theta = 70 (pi/180)
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s = 85.52 feet

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2 years ago

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The triangular prism shown has triangular _____face(s) and lateral face(s).

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Answer:

The triangular prism shown has 2 triangular face(s) and 3 lateral face(s).

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Step-by-step explanation:

A triangular face of the prism is the face that has a three sided figure while the lateral faces are faces with four-sided figure. As seen from the triangular prism, it has 2 triangular faces since it is made up of 2 right angled triangles and has 3 lateral faces since it is made up of 3 rectangles which are 4 sided each.

Area of one triangular face = $\frac{1}{2} * base * height$

Given base = 2.5 mm and height = 6 mm

Area of one triangular face = $\frac{1}{2} *2.5 * 6\\$

$= 3*2.5\\= 7.5mm^{2}$

Surface area of triangular prism = bh + pH

b= base of the triangle = 2.5 mm

h- height of the triangle = 6 mm

p= perimeter of the triangle = base + height + slant height = 2.5+6+6.5

p = 15 mm

H= height of the prism = 8mm

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Surface area of triangular prism = 15 + 120

Surface area of triangular prism = 135mm²

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2 years ago

Find the point estimate of the proportion of people who wear hearing aids if, in a random sample of 493 people, 40 people had he

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Point estimate proportion is the average of lower and upper interval limit.

Point estimate proportion )p) = x/n
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Substituting;

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Answer:

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Step-by-step explanation:

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Take $\frac{d}{dt}$ of of each term.

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