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3 years ago

Please help I need today

Mathematics

1 answer:

Serga [27]3 years ago

3 0

Answer:

x = 62

Step-by-step explanation:

X and 62 are vertical angles and vertical angles are equal.

x = 62

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Find the equation of the line through (-9,6) that is perpendicular to the line through (7,8),

Setler [38]

Step-by-step explanation:

I assume as "equation" we mean the slope-intercept form :

y = ax + b

"a" is the slope of the line (y coordinate change / x coordinate change when going from one point to another on the line). b is the y-intercept (the y value when x = 0).

we get the slope by finding the perpendicular slope of the first line.

the slope of the first line when going from (-3, -9) to (7, 8) :

x changes by + 10 (from -3 to +7).

y changes by + 17 (from -9 to +8).

so, that slope is 17/10.

the perpendicular slope is turning the original slope upside-down and flips the sign :

-10/17

so, a = -10/17

now, as we have only the slope and a point of the new line, we can use the point-slope form to stay and then transfer into the slope-intercept form.

y - y1 = a(x - x1)

where "a" is again the slope, and (x1, y1) is a point on the line

y - -6 = -10/17 × (x - -9)

y + 6 = -10/17 × (x + 9) = -10/17 × x - 90/17

y = -10/17 × x - 90/17 - 6 =

= -10/17 × x - 90/17 - 102/17 =

= -10/17 × x - 192/17

so, the equation is (in a maybe nicer way)

y = -1/17 × (10x + 192)

7 0

1 year ago

Naya [18.7K]

Answer:

63.6cm²

Step-by-step explanation:

Area of square = 81

Side of square = $\sqrt{81}$

= 9

-----------------------------------------

diameter of circle = 9

radius of circle = 9 ÷ 2

= 4.5

area of circle = πr²

= π (4.5)²

= 63.6172512

≈ 63.6 cm²

3 0

3 years ago

Please show all work

garri49 [273]

Answer:

Its too small I cant read it

Step-by-step explanation:

6 0

3 years ago

An experienced cashier at a grocery store takes 2 seconds to scan each item and 40 seconds to process the customer's payment. 1)

Liono4ka [1.6K]

The right answer is Option D: 43 items

Step-by-step explanation:

Time taken to scan each item = 2 seconds

Time taken to process the payment = 40 seconds

Let,

x be the number of items bought

y be the total time

y = 2x+40 Eqn 1

Now

Total time = 2 minutes and 6 seconds

1 minute = 60 seconds

2 minutes = 2*60 = 120 seconds

Total time = 120+6 = 126 seconds

Putting y=126 in Eqn 1

$126=2x+40\\126-40=2x\\86=2x\\2x=86$

Dividing both sides by 2

$\frac{2x}{2}=\frac{86}{2}\\x=43$

43 items are being purchased.

The right answer is Option D: 43 items

Keywords: addition, division

Learn more about division at:

#LearnwithBrainly

4 0

3 years ago

drag the tiles to the correct boxes to complete the pairs match each expression to the correct verb description

enot [183]

Answers and justitication:

1) (7x)^3 + 8→ 8 added to the cube of 7x

becasue the cube of 7x is (7x)^3 and then 8 is added to it.

2) (7x + 8)^3 → the cube of the sum of 7x + 8

because first you add 8 to 7x and then the result is cubed.

3) 7x^3 + 8 → 8 added to 7 and x cubed.

4) 7(x+8)^3 → 7 times the cube of the sum of x and 8.

because first 8 is added to 8, then the result is cubed, and finally the result is multiplied by 7.

3 0

4 years ago

Read 2 more answers