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bazaltina [42]
3 years ago
15

3(x+4.5)=36 what is x

Mathematics
2 answers:
Anna35 [415]3 years ago
7 0

Answer:

x=7.5

Step-by-step explanation:

x+4.5=\frac{36}{3}=12

x=12-4.5=7.5

exis [7]3 years ago
7 0

Answer:

X is 7.5

Step-by-step explanation:

36÷3=12

12 - 4.5=7.5

Therefore X is 7.5

Hope this helped!

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HURRY I'LL PICK A BRAINLIEST PERSON!!!
Rzqust [24]

Answer:

The only options which are having same solution as the given equation is A, B and D.

Explanation:

Given the equation: \frac{3}{5}x+ \frac{2}{3} +x =\frac{1}{2}- \frac{1}{5}x ......[1]

Like terms are terms whose variables are the same.

In the given equation [1],

Combine like terms of variable x on LHS; we have

\frac{3x+5x}{5}+ \frac{2}{3} =\frac{1}{2}- \frac{1}{5}x

Simplify:

\frac{8x}{5}+\frac{2}{3} =\frac{1}{2}- \frac{1}{5}x

or we can write this as;

\frac{8}{5}x +\frac{2}{3} =\frac{1}{2}- \frac{1}{5}x .

LCM(Least Common Multiple) to change each fraction to make their denominators the same as the least common denominator.

Taking LCM to both sides of an equation [1] as;

LCM of 3, 5 on LHS is 15 and LCM of 2 , 5 on RHS is 10;

\frac{9x+10+15x}{15} = \frac{5-2x}{10}

By cross multiplication we get;

10 \cdot (9x+10+15x) = 15 \cdot (5-2x)

Divide both side by 5 we get;

2 \cdot (9x+10+15x) = 3 \cdot (5-2x)

Using distributive property on both sides of an equation (i.e,   a\cdot (b+c) =a\cdot b+a\cdot c )

we have;

18x+20+30x = 15-6x                 ......[2]

Additive Property of Equality states that allows one to add the same quantity to both sides of an equation.

Using additive property of equality:

Add 6x to both sides of an equation in [2];

18x+20+30x+6x = 15-6x+6x  

Simplify;

18x+20+30x+6x = 15  

Combine 18x and 6x  we get;

24x+20+30x= 15                      ......[3]

Subtraction Property of Equality states that allows one to subtract the same quantity to both sides of an equation.

Subtract 20 from both sides of an equation in [3] we get;

24x+20+30x-20= 15-20

Simplify:

24x+30x= -5

Therefore, from the given options only A, B and D have the same solution as \frac{3}{5}x+ \frac{2}{3} +x =\frac{1}{2}- \frac{1}{5}x








3 0
3 years ago
Read 2 more answers
What is -2 + 7x = 12
8090 [49]

Answer:

easy the answer is

Step-by-step explanation:

-2 + 7x = 12

+2 +2

7x + 14

14 / 7x = 2

5 0
3 years ago
Equations must be written in the following format (using the number 20 as an example): Addition x + 20 = y; Subtraction x - 20 =
inn [45]

Answer:

In the graph we can find two points, lets select:

(2, 15) and (4, 30)

Those are the first two points.

Now, for two pairs (x1, y1) (x2, y2)

The slope of the linear equation y = s*x + b that passes trough those points is:

s = (y2 - y1)/(x2 - x1)

So the slope for our equation is

s = (30 - 15)/(4 - 2) = 15/2

then our linear equation is

y = (15/2)*x + b

now we can find b by imposing that when x = 2, y must be 15 (for the first point we selected)

15 = (15/2)*2 + b = 15 + b

b = 15 - 15 = 0

then our equation is:

y = (15/2)*x

Where we used a division and a multiplication.

4 0
3 years ago
Marni has 11 ounces of walnuts. She needs 6 ounces for one recipe and \frac {1}{4} 4 1 ​ pound for another. There are 16 ounces
Katena32 [7]

Answer:

Yes she has enough walnuts for her two recipes

Step-by-step explanation:

Total number of walnuts that Marni has = 11 ounces

She has two receipe

First recipe = 6 ounces

Second recipe = 1/4 pounds

Hence,

To find out if she has enough:.we add up the number of ounces from both recipes

The second recipe is in pounds hence, we convert to ounces.

1 pound = 16 ounces

1/4 pound =

Cross Multiply

= 1/4 pounds × 16 ounces/1 pound

= 4 ounces

Hence, we can add up now

First recipe + Second recipe

= 6 ounces + 4 ounces

= 10 ounces.

Since both recipes would require a total of 10 ounces of walnuts and Marin has 11 ounces, we can conclude that Marin has enough ounces of walnuts for her two recipes.

5 0
3 years ago
Read 2 more answers
mf help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Andrej [43]

Answer:

Your answer is A.

Hope this helps!

Step-by-step explanation:

Line r's equation is

y = - 4/3x - 4

And Line s's equation is

y = 2/5x - 2

4 0
3 years ago
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