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Ymorist [56]
3 years ago
8

What's the answer for x=39+12

Mathematics
2 answers:
julia-pushkina [17]3 years ago
8 0

Answer:

x = 51

Step-by-step explanation:

39+12= 51

bazaltina [42]3 years ago
8 0

Answer:51

Step-by-step explanation: 39 plus 12 equals 51

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Convert 120 km/h to feet per second with an explanation.
balu736 [363]
1m =3.28 feet    1km= 1000m    1km=3 280 feet

120x3 280=393 600feet/h          1h=3 600sec

393 600/3 600=109.33feet/sec

6 0
3 years ago
The equation 3x + 2 = 29 is modeled below.
DanielleElmas [232]

Answer:

Subtract 2 from both sides.

Step-by-step explanation:

Remember to do the opposite of PEMDAS. PEMDAS is the order of operation, and stands for:

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

> Also, note the equal sign, what you do to one side, you do to the other side of the equation.

First step is to subtract 2 from both sides of the equation:

3x + 2 (-2) = 29 (-2)

3x = 29 - 2

3x = 27

The second step is to divide 3 from both sides of the equation:

(3x)/3 = (27)/3

x = 27/3

x = 9

~

7 0
3 years ago
Read 2 more answers
What is the equation of the line through (5, 1) with a slope of -3?
Vlad1618 [11]

Answer:

B. y-1=3(x-5)

Step-by-step explanation:

y=_+_(x-_)

y=1+(-3)(x-5)

y-1=3(x-5)

6 0
3 years ago
Factorise the expression 4(x+1)^2-49 . plz solve this i will mark you the brainliest
Vinil7 [7]

Answer:The answer is : Expand the square

4(x+1)the second square - 49

4(x+1)x+1)-49

The solution is : 4x second square + 8x - 45

Step-by-step explanation:

5 0
3 years ago
A sample of marble has a volume of 6 cm3 and a density of 2.76 g/cm3. What is its mass?
Drupady [299]

Answer:

16.56\ g

Step-by-step explanation:

we know that

The density is equal to the mass divided by the volume

Let

x-----> the mass of marble

y----> the volume of marble

z----> the density of marble

z=\frac{x}{y}

in this problem we have

y=6\ cm^{3}

z=2.76\ g/cm^{3}

substitute and solve for x

2.76=\frac{x}{6}

x=2.76*6=16.56\ g


3 0
4 years ago
Read 2 more answers
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