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3 years ago

Need help with linear equations with substations

1 answer:

6 0

A way to solve a linear system algebraically is to use the substitution method. ... We can substitute y in the second equation with the first equation since y = y.

this is what i know about it

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Find X

Dima020 [189]

Answer:

x=10

Step-by-step explanation:

3x+8x=100+10

11x=110

x=110/11

x=10

5 0

3 years ago

Which expression is equivalent to 7.2 x 7.2 x 7.2 ?

Sladkaya [172]

Answer:

7.2^3 or 7.2 cubed=373.248

4 0

3 years ago

*SUPER EASY POINTS**COORDINATES RELATED*

andreev551 [17]

Answer:

8. (0,-2)

9. (-2,1)

Step-by-step explanation:

Lucy's house is at (1,1)

Down means in the y coordinate , left means negative x

Down 3 means subtract 3 from y

left 1 means subtract 3 from x

(1-1, 1-3)

(0,-2)

9. Lucy is at (1,1)

3 units to the left

left means subtract 3 from x

(1-3, 1)

(-2,1)

4 0

3 years ago

2/5y - 4 + 7 - 9/10y with steps

Lesechka [4]

Let's simplify step-by-step.

2/ 5 y−4+7− 9 /10 y = 2 /5 y+−4+7+ −9 /10 y

Combine Like Terms: = 2 /5 y+−4+7+ −9 /10 y

(2 /5 y+ −9 /10 y)+(−4+7) = −1 /2 y+3

Answer: = −1 /2 y+3

Hope I could help! :)

3 0

3 years ago

An adventurous dog strays from home, runs three blocks east, two blocks north, one block east, one block north, and two blocks w

Marrrta [24]

<h2>Answer:</h2>

<u>Distance = 360.55 m</u>

<u>Direction = North-East</u>

<h2>Step-by-step explanation:</h2>

In the question,

The adventurous dog starts from O, say.

He moves 3 blocks East = 300 m

then,

2 blocks North = 200 m

1 block East = 100 m

1 block North = 100 m

2 blocks West = 200 m

So,

Distance of the Dog's <u>final position</u> from the <u>initial position</u><u>.</u>

OE is given by,

In triangle OLE, using Pythagoras theorem,

$OE^{2}=OL^{2}+LE^{2}\\OE^{2}=(200)^{2}+(300)^{2}\\OE^{2}=40000+90000\\OE=360.55\,m$

<em><u>Therefore, the distance of Dog from the Home is 360.55 m and the direction of Dog from Home is North-East.</u></em>

8 0

3 years ago