What is the simplified expression

Mathematics

2 answers:

Inessa [10]3 years ago

7 0

Answer:

-4x-1

Step-by-step explanation:

KiRa [710]3 years ago

7 0

Hello,

-1(2x + 3) - 2(x - 1) = -1 * 2x - 1 * 3 - 2 * x - 2 * -1 = - 2x - 3 - 2x + 2 = -4x - 1.

Have a nice day !

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The game show contestant spins a spinner with the letters E, W, Y, l and Z on it, then either an easy or a hard question is pick

prisoha [69]

Answer:

1/5

Step-by-step explanation:

We assume the events are independent, so the probability of the joint event is the product of the probabilities of the individual events.

P(Y or W) = 2 letters of 5 = 2/5

P(easy) = 1 of 2 kinds = 1/2

The product of these is ...

P((Y or W) and (easy)) = (2/5)(1/2) = 1/5

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In both cases, we have to assume that each of the possible outcomes is equally likely.

5 0

3 years ago

I have 8 pennies and some quarters, nickels, and dimes. The number of pennies plus nickels equals the number of dimes. I have 3

Darina [25.2K]

There are five nickels.

Let w = the number of pennies; x = the number of nickels; y = the number of dimes; z = the number of quarters.

Then, we have three equations with four unknowns:

(1) w + x = y

(2) 3w = 2z

(3) 2y = 3z

However, there is a fourth unstated condition: w, x, y, and z must all be integers.

Assume that z = 6 (to avoid fractions).

From Equation (2), w = 4.

From Equation (3), y = 9.

Insert the values for w and y into equation (1).

4 + x = 9

x = 9 – 4 = 5

Thus, there are 4 pennies, 5 nickels, 9 dimes, and 6 quarters.

Check: 4 pennies + 5 nickels = 9 dimes

6 quarters + 4 pennies = 3 quarters for every 2 pennies

9 dimes + 6 quarters = 3 dimes for every 2 quarters

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3 years ago

Read 2 more answers

Hilda has $210 worth of $10 and $12 stock shares. The number of $10 shares is five more than twice the number of $12 shares. How

klasskru [66]

Let's first define variables.
y: number of shares of $ 10
x: number of shares of $ 12
We write the system of equations:
10x + 12y = 210
y = 2x + 5
Solving the system:
x = 75/17
y = 235/17
Answer:
she has:
75/17 shares of $ 12
235/17 shares of $ 10