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mariarad [96]
4 years ago
15

- Write an equation perpendicular to 5x + 3y = -21 that passes through the point (-5, 1).

Mathematics
1 answer:
Doss [256]4 years ago
7 0

Answer:

the desired equation is y = (3/5)x + 4

Step-by-step explanation:

Solving the given 5x + 3y = -21 for 3y yields  3y = -5x - 21.  Dividing all three terms by 3, we get:

y = (-5/3)x - 7, indicating that the given line has slope -5/3.

The slope of a line perpendicular to this y = (-5/3)x - 7 is 3/5, the negative reciprocal of -5/3.

Start with y = mx + b.  Substitute 1 for y, -5 for x and 3/5 for m.  Then:

1 = (3/5)(-5) + b, or

1 = -3 + b.  Then b must be 4, and so the desired equation is y = (3/5)x + 4.

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3 years ago
Please answer the following questions​
Vlada [557]

Step-by-step explanation:

sorry I can only explain as there are no labels to each diagram

The first diagram is single and can solved using triangular formular given as 1/2 ×base × height

A = 1/2 × 5 × 12

A = 30cm^2..

as for the second one...it consist of 2 diagrams which will be solved separately before adding ...it can simply be done using Pythagoras theorem..

To get the smaller part ...out tita is 45degrees while our adjacent is 4 and opposite is x we are to find x which is the height...

using SOH CAH TOA...

WE HAVE TAN45= opp/adj

Tan45= x/ 4

Tan 45 =1 ...so

1 = x/ 4

and x= 4 ...

so...having our height as 4 and base as 4 ..

Area of smaller triangle become 1/2 × 4 × 4

A = 8cm^2 ...

......SOLVING FOR THE SECOND DIAGRAM ..

WE HAVE the height as ( dotted spot + undotted spot ) = 4 + 4 = 8cm

and our base can be gotten from

Tan45 = opp / adj

1 = 8/x ..

x = 8cm ....so the base is 8 and the height is 8

..

The Area becomes 1/2 × 8×8 = 32cm ...

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5 0
3 years ago
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8 0
3 years ago
Which of the following equations is a linear function? *
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Answer:

C

Step-by-step explanation:

7 0
3 years ago
A new electronics company, HOTWIRED, is working on two new docking stations to release this
inna [77]

Answer:

The objective function is P(x,y) = 55x + 95y

P(600, 1400) is $166000

P(600, 1700) is $194500

P(1500, 1700) is $244000

P(1200, 800) is $142000

P(1500, 800) is $158500

They need to sell 1500 of the basic models  and 1700 of the advanced models to make the maximum profit

Step-by-step explanation:

Let us solve the question

∵ x denotes the number of  basic models

∵ y is the number of advanced models

∵ They will make $55 on each basic model

∵ They will make $95 on each advanced model

→ The profit is the total amount of money-making on them

∴ Profit = 55(x) + 95(y)

∴ Profit = 55x + 95y

∴ The objective function is P(x,y) = 55x + 95y

Let us test the vertices on the objective function

∵ The vertices are (600, 1400), (600, 1700), (1500, 1700), (1200, 800),

   and (1500, 800)

→ substitute each vertex in the objective function

∵ x = 600 and y = 1400

∴ P(600, 1400) = 55(600) + 95(1400) = 166000

∴ P(600, 1400) = $166000

∵ x = 600 and y = 1700

∴ P(600, 1700) = 55(600) + 95(1700) = 194500

∴ P(600, 1700) = $194500

∵ x = 1500 and y = 1700

∴ P(1500, 1700) = 55(1500) + 95(1700) = 244000

∴ P(1500, 1700) = $244000

∵ x = 1200 and y = 800

∴ P(1200, 800) = 55(1200) + 95(800) = 142000

∴ P(1200, 800) = $142000

∵ x = 1500 and y = 800

∴ P(1500, 800) = 55(1500) + 95(800) = 158500

∴ P(1500, 800) = $158500

∵ The greatest profit is $244000

→ That means the maximum profit will be with vertex (1500, 1700)

∴ They need to sell 1500 of the basic models  and 1700 of the

   advanced models to make the maximum profit

3 0
4 years ago
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