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adoni [48]
3 years ago
5

Answer please i will give brainliest

Mathematics
1 answer:
il63 [147K]3 years ago
7 0

Step-by-step explanation:

a.

simply add both equations

x + y = 2

-3x - y = 5

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

-2x + 0 = 7

x = -7/2

x + y = 2

-7/2 + y = 2

y = 2 + 7/2 = 4/2 + 7/2 = 11/2

b.

1/2 x + 2y = -13

x - 4y = 8

first multiply the first equating by 2

x + 4y = -26

x - 4y = 8

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

2x + 0 = -18

x = -18/2 = -9

x - 4y = 8

-9 - 4y = 8

-4y = 17

y = -17/4

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6:38 PM Wed Apr 29<br> D 1.<br> Simplify: (4x² – 3x + 8) – (3x2 – 5)
Juli2301 [7.4K]

Answer:

x^2+−3x+13

Step-by-step explanation:

simplify step-by-step.

4x^2−3x+8−(3x^2−5)

Distribute the Negative Sign:

=4x^2−3x+8+−1(3x^2−5)

=4x^2+−3x+8+−1(3x^2)+(−1)(−5)

=4x^2+−3x+8+−3x2+5

Combine Like Terms:

=4x2+−3x+8+−3x^2+5

=(4x^2+−3x^2)+(−3x)+(8+5)

=x^2+−3x+13

4 0
3 years ago
Select the coin which cannot be used by itself to count 0.75.
cestrela7 [59]
It is a dime cause a dime is 10¢ and you cannot divide 75 by 10 you get a decimal
3 0
3 years ago
What is the answer to this?
rosijanka [135]

Answer:

The correct answer would be D

Step-by-step explanation:

You reflect the shape over the Y-Axis

Move all points left 1

Move all points down 2

7 0
3 years ago
Read 2 more answers
Express each ratio as a fraction in the simplest form 10 dimes out of 18 coins
Sati [7]

Answer:

5/6

Step-by-step explanation:

10 dimes to 18 coins can be written as 10/18 and can be simplified down to 5/6

5 0
3 years ago
Mr. Richardson is driving to a town 85 miles away. He drives 35 miles per hour for 2 hours before stopping for lunch. He drives
Vlad [161]

Answer:

  (a)  85 - (35 x 2) - 6

Step-by-step explanation:

The miles Mr. Richardson has left to drive will be the difference between the distance to his goal and the miles he has alread driven. The relation between distance, speed, and time can be used to find the miles he drove before lunch.

__

<h3>before lunch</h3>

  distance = speed × time

  miles before lunch = (35 mi/h) × (2 h) = (35 × 2) mi

<h3>total driven</h3>

The total miles driven before stopping for gas will be ...

  miles before stopping for gas = (miles before lunch) + (6 more miles)

  = 35 ×2 +6 . . . miles

<h3>miles remaining</h3>

Then the remaining miles are ...

  remaining = trip miles - miles driven

  = 85 -(35 ×2 +6)

  = 85 - (35 ×2) -6 . . . . . miles left to drive

4 0
2 years ago
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