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3 years ago

The elimination method works when the equations are in what form

Mathematics

1 answer:

egoroff_w [7]3 years ago

6 0

The answer is standard form. When the equation is set up as Ax + By = C where A and B are coefficients.

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Arithmetic sequence for -1 -6 -11 -16 expression

vampirchik [111]

Answer:

hello :

note :

the nth term of an arithmetic sequence is :

An =A1+(n-1)d ....a common difference is : d ... A1 : the first term

in this exercice : A1 = - 1 d = (-6) -(- 1) = -5

An = - 1 + (n - 1)(-5)

the expression is : An = - 5n +4

4 0

3 years ago

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A car takes 4 hours to reach a destination traveling at a speed of 63 km/h. How long will it take to cover the same distance if

Gre4nikov [31]

Answer:

It will take 4.5hrs to cover the same distance

The constant of variation,k=252

Step by step explanation

Given that,

$speed = \frac{distance}{time}$

From the question

Time=4hr

Speed=63km

By substitution we obtain,

$63= \frac{distance}{4}$

Cross multiplying we get,

$distance=63 \times 4$

$distance=252km$

Now,

speed=56km

Distance Covered=252km

By substitution:

We obtain,

$56= \frac{252}{time}$

Cross multiply

$56\times time=252$

Divide through by 56

$time= \frac{252}{56}$

$time=4.5hrs$

From the formula,

$speed= \frac{distance}{time}$

Which means that, speed and time varies inversely.

$speed\propto \frac{1}{time}$

Let k be variation constant

This implies that

$speed = k \times \frac{1}{time}$

$k=speed \times{time}$

Taken,

Time=4hrs

speed=56km

$k=56\times4$

$k=252$

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2 years ago

4<br> 7z+<br> 2<br> 7z+(−9+11)=

UkoKoshka [18]

Answer:

what a fantastic day I would like

Step-by-step explanation:

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2 years ago

Help!

Bezzdna [24]

Answer:

The answer is c = 2 + 3d .

Step-by-step explanation:

It is given that a cab ride cost $2 which is a fixed amount and charges additional $3 per mile. So you have to make an equation of c in terms of d :

Let c be the cost,

Let d be the distance,

c = 2 + 3d

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2 years ago

Blake has b baseball cards. His aunt gave him more cards, increasing his total number of cards by 25%. Which expression represen

Vera_Pavlovna [14]

.25b+ b is the answer to ur question

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3 years ago

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