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4 years ago

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If A and B are the points (5,3) and (15,-7) respectively. Find the coordinates of the point which divides AB externally in the r

atio 3:1

1 answer:

Tpy6a [65]4 years ago

8 0

Answer:

Step-by-step explanation:

Listen c.ovidsomtochi check your book

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Un boligrafo cuesta 30 ptas mas que un lapiz. Un muchacho ha comprado 8 boligrafos y 15 lapices. En total le han costado 700 pta

Firdavs [7]

Por un sistema de ecuaciones, tiene-se que:

Cada lapiz cuesta 20 ptas.
Cada boligrafo cuesta 50 ptas.

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

Considera-se un sistema de ecuaciones, con cada boligrafo custando x y cada lapiz custando y.

<u>Boligrafo cuesta 30 mas que un lapiz</u>, o sea, $x = 30 + y$
<u>8 boligrafos y 15 lapices cuesta 700</u>, o sea, $8x + 15y = 700$

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

Aplicando el <u>primer ecuación en la segunda, </u>tiene-se el cuesto de cada lapiz:

$8x + 15y = 700$

$8(30 + y) + 15y = 700$

$240 + 8y + 15y = 700$

$23y = 460$

$y = \frac{460}{23}$

$y = 20$

Cada lapiz cuesta 20 ptas.

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

Por fin, el cuesto de cada boligrafo es dado por:

$x = 30 + y = 30 + 20 = 50$

Cada boligrafo cuesta 50 ptas.

Un problema similar es dado en brainly.com/question/24637096

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3 years ago

A man walks 10 miles in x hours. how far does he ealk in one hour

padilas [110]

Answer:

The expression that represents this would be 10/x Miles.

Step-by-step explanation:

6 0

3 years ago

Use the expression 28b - 4c. Part B: What is the value of the expression when b = -4 and c = 1? Show your work or explain.

Brilliant_brown [7]

Answer:

The value of the expression is -116

Step-by-step explanation:

Given

$Expression: 28b - 4c$

Required

Solve when b = -4 and c = 1

$Expression: 28b - 4c$

Substitute -4 for b and 1 for c

$Expression: 28*-4 - 4*1$

$Expression = -28*4 - 4$

$Expression = =112 - 4$

$Expression: -116$

<em>The value of the expression is -116</em>

3 0

3 years ago

(1/x-4)• (-x^2+9x-20/x+2)<br> (Multiplying And Dividing Rational Expressions)

IRISSAK [1]

ANSWER

$\frac{5 - x}{x + 2}$

EXPLANATION

We want to simplify the rational expression:

$( \frac{1}{x - 4)} )( \frac{ - {x}^{2} + 9x - 20}{x + 2} )$

We split the middle term to obtain:

$( \frac{1}{x - 4)} )( \frac{ - {x}^{2} + 5x + 4x- 20}{x + 2} )$

We now factor to obtain;

$( \frac{1}{x - 4)} )( \frac{-x(x - 5) + 4(x - 5)}{x + 2} )$

$( \frac{1}{x - 4)} )( \frac{(x - 5)(4 - x)}{x + 2} )$

Or

$( \frac{1}{x - 4)} ) ( \frac{ - (x - 5)(x - 4)}{x + 2} )$

We cancel the common factors to get;

$\frac{ - (x - 5)}{x + 2}$

$= \frac{5 - x}{x + 2}$

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3 years ago

Has anyone seen the show julie and the phantoms on netflix?

UNO [17]

No is it good? Ive heard of it bfore

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3 years ago

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