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3 years ago

5.Solve:

Mathematics

1 answer:

lara31 [8.8K]3 years ago

8 0

Answer:

C) x=2 y=-1 z=3

Step-by-step explanation:

2x + y - z = 0

2(2) + (-1) - (3) = 0

0 = 0

x - y + z =6

2 - (-1) + 3 = 6

6 = 6

x + 2y + z = 3

2 + 2(-1) + 3 = 3

3 = 3

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What is 0.242÷ by 0.4

PtichkaEL [24]

the answer is 0.605 if you need help message me

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3 years ago

Use conversions to solve the problem. Devante buys 1 1/2

melomori [17]

Answer:

45 oz

Step-by-step explanation:

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3 years ago

2) Evaluate the given numerical expression. A) 9 B) 12 C) 14 D) 21

eduard

Answer:

$\boxed{\sf{14}}$

Step-by-step explanation:

$\boxed{\underline{\text{ORDER OF OPERATIONS:}}}$

Use the order of operations.

Note: PEMDAS or BODMAS stands for:

PEMDAS

Parentheses
Exponents
Multiply
Divide
Add
Subtract

BODMAS

Brackets
Order
Divide
Add
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First, do parentheses.

3+6*(5+4)÷3-7

(5+4)=9

$\Longrightarrow: \sf{3+6* 9\div 3-7}$

Do multiply and divide.

6*9=54

54/3=18

Then, rewrite the problem down.

$\Longrightarrow: \sf{3+18-7}$

Add.

$\sf{3+18=21}$

$\sf{21-7=\boxed{\sf{14}}$

$\Longrightarrow: \boxed{\sf{14}}$

Therefore, the correct answer is "C. 14".

I hope this helps, let me know if you have any questions.

8 0

3 years ago

4a + 2z = 10 -3a + Z = -10 What is the value of 10a

vredina [299]

Answer:

10a = 30

Step-by-step explanation:

By using elimination:

4a + 2z = 10

-2(3a + z) = -2(-10)

4a + 2z = 10

6a - 2z = 20

2z and -2z cancel out

10a = 30

a = 3

They are asking for 10a, so 10 (3) = 30.

4 0

3 years ago

Read 2 more answers

Suppose that you want to mix two coffees in order to obtain 100 pounds of a blend. If x represents the number of pounds of coffe

evablogger [386]

Answer:

Algebraic expression representing number of coffee B = 100-x

Step-by-step explanation:

An algebraic expression is an expression that contains unknowns denoted with alphabets or symbols and natural numbers.

Coffee blend is 100 pounds and x represent number of pounds of coffee A

Hence coffee B = 100-x

Algebraic expression representing number of coffee B = 100-x

8 0

3 years ago