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trasher [3.6K]
3 years ago
11

Match each expression with an equivalent expression.

Mathematics
1 answer:
jolli1 [7]3 years ago
6 0

1=6x-4x

2= 6x-4

3=6-4x

4=6x-4y

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5. 3x + 5y + 5z =1<br> x - 2y = 5<br> 2x + 4y = 11
lilavasa [31]

Answer:

see explanation

Step-by-step explanation:

Given the 3 equations

3x + 5y + 5z = 1 → (1)

x - 2y = 5 → (2)

2x + 4y = 11 → (3)

Use (2) and (3) to solve for x and y

Multiply (2) by 2

2x - 4y = 10 → (4)

Add (3) and (4) term by term

4x = 21 ( divide both sides by 4 )

x = \frac{21}{4\\}

Substitute this value of x into (3)

2 × \frac{21}{4\\} + 4y = 11

\frac{21}{2\\} + 4y = 11 ( subtract \frac{21}{2\\} from both sides )

4y = \frac{1}{2} ( divide both sides by 4 )

y = \frac{1}{8\\}

Substitute the values of x and y into (1) and solve for z

3 × \frac{21}{4\\} + 5 × \frac{1}{8\\} + 5z = 1

\frac{63}{4} + \frac{5}{8} + 5z = 1

\frac{131}{8} + 5z = 1 ( subtract \frac{131}{8} from both sides )

5z = - \frac{123}{8} ( divide both sides by 5 )

z = - \frac{123}{40}

Solution is

x = \frac{21}{4\\}, y = \frac{1}{8\\}, z = - \frac{123}{40}

3 0
2 years ago
( 2 + 7 -14<br>Turn over​
Viefleur [7K]

Answer:

<h2>9</h2>

Step-by-step explanation:

2 + 7 - 14 flipped around =

14 - 7 + 2 =

7 + 2 =

9

<em>Hope that helps! :)</em>

<em></em>

<em>-Aphrodite</em>

4 0
3 years ago
Brianna managed to save up $400 and opened up a savings account.The bank offers a 1.25% interest rate to all new savings account
Brilliant_brown [7]
In one month she will have 5 bucks interest with a total of 405$.
8 0
3 years ago
A jar contains nickles and pennies. There are 56 coins in the jar in all. The total value the total value of the coins are $1.52
timofeeve [1]
<span>Let the number of nickles be x Let the number of pennies be y Value Value Type Number of of of of EACH ALL coin coins coin coins ------------------------------------------- nickles x $0.05 $0.05x pennies y $0.01 $0.01y ------------------------------------------- TOTALS 56 ----- $1.52 The first equation comes from the second column.</span>
6 0
3 years ago
Read 2 more answers
What us the intercept form of (1,2) and (4,-4)
lutik1710 [3]

first you need to find the slope (m) using y2-y1/x2-x1.

-4-2/4-1= -6/3=-2

m=-2

then plug into the intercept form formula: y-y1=m(x-x1)

y-2=-2(x-1)

5 0
3 years ago
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