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2 years ago

Help help help please using the elimination solve this

Mathematics

1 answer:

serious [3.7K]2 years ago

3 0

Answer:

a = 15

b = -14

Step-by-step explanation:

Here, we want to solve by elimination

let us start by rewriting the first equation

We can do this by multiplying through by 10

We have this as;

2a -5b = 100

Now let us eliminate

Multiply equation ii by 2 and equation i by 1

2a -5b = 100

2a-2b = 58

Subtract equation ii from i

-3b = 42

b = 42/-3 = -14

Secondly;

Multiply equation ii by 5 and i by 1

2a - 5b = 100

5a -5b = 145

Subtract ii from i

-3a = -45

a = 45/3

a = 15

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Volgvan

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2 years ago

Eliminate the parameter.<br><br><br>x = 5t, y = t + 8 (2 points)

maxonik [38]

Answer: y = $\frac{1}{5}$ x + 8

Step-by-step explanation:

This is asking us to remove the parameter. In other words, we want an equation with only the relation between x and y, so we need to remove the t. There are a few ways to do this, but I am going to set one equation equal to t and then plug it into the next one.

Given:

x = 5t

Divide both sides of the equation by 5:

t = $\frac{1}{5}$ x

Given:

y = t + 8

Plug in:

y = ( $\frac{1}{5}$ x) + 8

Answer:

y = $\frac{1}{5}$ x + 8

8 0

1 year ago

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tatyana61 [14]

$f(x)=\left(\dfrac{1}{2}\right)^x\\\\for\ x=-3\to y=\left(\dfrac{1}{2}\right)^{-3}=2^3=8\to(-3,\ 8)\\\\for\ x=-2\to y=\left(\dfrac{1}{2}\right)^{-2}=2^2=4\to(-2,\ 4)\\\\for\ x=-1\to y=\left(\dfrac{1}{2}\right)^{-1}=2^1=2\to(-1,\ 2)\\\\for\ x=0\to y=\left(\dfrac{1}{2}\right)^0=1\to(0,\ 1)\\\\for\ x=1\to y=\left(\dfrac{1}{2}\right)^1=\dfrac{1}{2}\to\left(1,\ \dfrac{1}{2}\right)\\\\for\ x=2\to y=\left(\dfrac{1}{2}\right)^2=\dfrac{1}{4}$

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3 years ago

Says the directions in the picture.<br> Please help me before my next geometry class tomorrow.

SashulF [63]

Distance formula= [(x2-x1)^2 + (y2-y1)^2]^1/2
Origin= white house = (0,0)
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3 0

3 years ago

3 bananas cost $0.99. At this rate, how much do 5 bananas cost?

Ierofanga [76]

Answer:

$1.65

Step-by-step explanation:

first i divided 0.99 by 3, equalling 0.33. i then multiplied 5 times 0.99 to equal 1.65.

7 0

2 years ago

Help help help please using the elimination solve this​

Help help help please using the elimination solve this