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3 years ago

Evaluate x+2.7 for x=-1.5

Mathematics

1 answer:

jonny [76]3 years ago

3 0

Answer:

1.2

Step-by-step explanation:

First make -1.5 equal to 0.

We'll have to add 1.5, right?

So 1.5 is in 2.7.

So now its 0 + ? = ?

2.7 - 1.5 = 1.2

So 0 + 1.2 = 1.2

Hope this helped.

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Answer:

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3 years ago

Find the point of intersection (if any) of the following pairs of lines: a) x – 2y +1=0 2x + 3y – 7 = 0 b) x-2y+11=0 -x+2y-13 =

pychu [463]

Answer:

a) (11/7, 9/7)

b) There's no point of intersection

Step-by-step explanation:

a) x - 2y + 1 = 0

2x + 3y - 7 = 0

To find the point of intersection, we need to solve the system of equations and the result will be the point of intersection (x,y)

$x-2y+1=0\\x= 2y-1$

Now we substitute x in the second equation:

$2x+3y-7=0\\2(2y-1)+3y-7=0\\4y-2+3y-7=0\\7y-9=0\\y=9/7$

Now we substitute y in our first equation.

$x-2y+1=0\\x-2(9/7)+1=0\\x-18/7+1=0\\x=18/7-1\\x=11/7$ .

The point of intersection is (11/7, 9/7)

b) x -2y +11 =0

-x + 2y - 13 =0

We are going to follow the same procedure:

$x-2y+11=0\\x=2y-11$

$-(2y-11)+2y-13=0\\-2y+11+2y-13=0\\0y=2\\0=2$

Since this system of equations doesn't have a solution, the system has no point of intersection.

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3 years ago

*Absurd answers will be reported* Can the fraction 12/30 be reduced/simplified? If it can, what can it be reduced by?

Fynjy0 [20]

Answer:

divided by 3 12/30 = 4/10 = 2/5

Step-by-step explanation:

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3 years ago

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olasank [31]

Answer:

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Step-by-step explanation:

Multiply 30.3 with 13.. Will get the answer 393.9

30.3= x / 13

X = 30.3 x 13

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3 years ago

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A rhombus and a square have one and the same side of 6 cm. The area of the rhombus is 4/5 of the area of the square. Find the he

Arada [10]

You will find the area the square and then find out what 4/5 of that area is.

A = bh
6 cm x 6 cm
A = 36 square cm

4/5 of 36 square cm
4/5 x 36
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The area of the rhombus is 28 4/5 square cm. Use this to solve for the height of the rhombus.

A = bh
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h = 4 4/5 cm

The height of the rhombus is 4 4/5 cm.

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3 years ago