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adelina 88 [10]
3 years ago
15

Evaluate the expression 3x - 2(y + 3) for x = 4 and y = 7

Mathematics
2 answers:
Sholpan [36]3 years ago
8 0

Answer:

-8

Step-by-step explanation:

3x4= 12, 7+3=10x2=20

12-20= -8

solmaris [256]3 years ago
7 0

Answer:

<em>The value of the expression is -8</em>

Step-by-step explanation:

Numerical value of expressions

We are given the expression:

3x - 2(y + 3)

Let's find its value for x = 4 and y = 7.

Substituting both values into the expression:

3*4 - 2(7 + 3)

Operating:

12 - 2(10)

12-20

-8

The value of the expression is -8

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How many terms are in the expression 3x^2y^4z-6xy-3z(5x^2)
EleoNora [17]
I would say 3 because terms are separated by a plus or minus sign and there are 2 subtraction signs separating 3 expressions.
6 0
3 years ago
The weights of bags filled by a machine are normally distributed with a standard deviation of 0.055 kilograms and a mean that ca
Sloan [31]

Answer:

Step-by-step explanation:

Given that the  weights of bags filled by a machine are normally distributed with a standard deviation of 0.055 kilograms and a mean that can be set by the operator.

Let the mean be M.

Only 1% of the bags weigh less than 10.5 kilograms

i.e. P(X<10.5) = 0.01

corresponding Z value for P(Z<z) = 0.01 is -0.025

i.e. 10.5 = M-0.025(0.055)

Solve for M from the above equation

M = 10.5+0.025(0.055)\\=10.501375

Rounding off we get

10.50 kgs

Mean weight should be fixed as 10.50 kg.

6 0
4 years ago
How much is 12 cents + 5 dimes + one 5 cents equals?
Mumz [18]
<h3>How much is 12 cents + 5 dimes + one 5 cents equals?</h3>

Heres the convertion of the money:

Convertion of a dime: 1d=10c

Convertion of a penny: 1p=1c

Convertion of a nickel: 1n=5c

Given

12p=12c

5d=50c

1n=5c  

12p+5d+5n=67cents

Therefore, <u>67 cents</u> is your correct answer.

Learn more about money here:

brainly.com/question/162522

3 0
2 years ago
Read 2 more answers
Which expression is equivalent to 9(-3f - 1) - 2f?​
Zigmanuir [339]

Answer:

-29f-9

Step-by-step explanation:

7 0
3 years ago
Cheryl plans to bake cookies tomorrow and needs to purchase chocolate chips and pecans for no more than $25 total. Chocolate chi
boyakko [2]

The inequality that correctly represents this scenario is given as follows:

2x + 5y \leq 25

The graph is given at the end of the question.

<h3>What is a system of inequalities?</h3>

A system of inequalities is when two or more variables are related, and inequalities are built to find the values of each variable.

In this problem, the variables are given as follows:

  • Variable x: number of chocolate chips purchased.
  • Variable y: number of pecans sold.

Chocolate chips are $2 per pound and pecans are $5 per pound. She wants to spend at most $25, hence:

2x + 5y \leq 25

More can be learned about a system of inequalities at brainly.com/question/3656398

#SPJ1

6 0
2 years ago
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