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soldi70 [24.7K]
3 years ago
6

What’s 18x3+12-1x34+13-2x56?

Mathematics
2 answers:
Alina [70]3 years ago
8 0

18 x 3 + 12 - 1 x 34 + 13 - 2 x 56 = 67

<=Work=>

18 x 3 = 54

1 x 34 = 34

2 x 56 = 112

(54) + 12 - (34) + 13 - (112)

66 - 34 + 13 - 112

32 + 13 - 112

45 - 112

= 67

Oliga [24]3 years ago
4 0

Answer: -67

Step-by-step explanation: Use PEMDAS, or order of operations. EPIC. Parenthesis, exponents, multiplication, division, addition, subtraction. Lit. Now, the first thing to do is multiply. 18 x 3=54.

54 + 12 - 1 x 34 + 13 - 2 x 56

Multiply 1 x 34 for 34

54 + 12 - 34 + 13 - 2 x 56

Multiply 2 x 56 to get 112

54 + 12 - 34 + 13 - 112

Now addition, so add 54 to 12 for 66

66 - 34 + 13 - 112

You also do the operation from left to right if there is addition and subtraction

66-34 = 32

32 + 13 -112

Add 13 to 32 for 45

45 - 112 = -67

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B-2/3

8 0
3 years ago
Sqrt(2x-6)=3-x<br> Solve for x
soldi70 [24.7K]

Answer:

x = 3

Step-by-step explanation:

\sqrt{2x - 6}  = 3 - x

Square both sides of the equation

2x - 6 = (3 - x)^{2} = 9 - 6x + x^{2} \\

x^{2}  - 8x + 15 = 0\\

(x - 3)(x - 5) = 0

x = 3 or 5

Now, you must always check your results because a result may not satisfy the original equation.

If x = 3, then \sqrt{2x - 6} = \sqrt{2(3) - 6} = \sqrt{6 - 6}  = \sqrt{0} = 0  and 3 - x = 3 - 3 = 0

So 3 satisfies the original.

If x = 5, then \sqrt{2(5) - 6}  = \sqrt{10 - 6} = \sqrt{4} = 2,  but 3 - x = 3 - 5 = -2.  Therefore, 5 does NOT satisfy the original equation.

That means that x = 3 is the solution to the equation.

5 0
2 years ago
Dan buys 24 packets of nuts. Each packet of nuts weighs 225g. Work out the total weight of all the packets of nuts that dan buys
Vlada [557]

Answer:

 Total weight of the nuts bought by Dan =  5.4 kg

Explanation:

Number of packets of nuts bought by Dan = 24

Weight of each packet of nuts = 225g

 Total weight of the nuts bought by Dan = Number of packets of nuts bought by Dan * Weight of each packet of nuts

    Total weight of the nuts bought by Dan = 24 * 225 = 5400 g = 5400/1000 kg = 5.4 kg

    Total weight of the nuts bought by Dan =  5.4 kg

3 0
3 years ago
The equation of line AB is y = 2x + 4. Write an equation of a line parallel to line AB in slope-intercept form that contains poi
ale4655 [162]

Answer:

<h3>The answer is option D</h3>

Step-by-step explanation:

Equation of a line is y = mx + c

where

m is the slope

c is the y intercept

y = 2x + 4

comparing with the above equation for a line

The slope / m = 2

Since the lines are parallel their slope are also the same

Slope of parallel line = 2

So we have

The equation of the line using point

( 3 , -2) and slope 2 is

y + 2 = 2( x - 3)

y + 2 = 2x - 6

y = 2x - 6 - 2

We have the final answer as

<h3>y = 2x - 8</h3>

Hope this helps you

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3 years ago
What is 13x7?????????????
m_a_m_a [10]
91 ! just use a calculator or do it by hand
7 0
3 years ago
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