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3 years ago

After you find the solution, how would you check to make sure your answer is correct?

Mathematics

2 answers:

solmaris [256]3 years ago

6 0

Answer:

To check if the solution is right you substitute.

Step-by-step explanation:

So in this case you put y = - 6

So you substitute the y as - 6

12(5+2y) = - (6-9y)+4y

12(5+ (2 times - 6)) =(6-(9 times - 6)) + (4 times - 6)

12 times (5+-12) = (6- -6) + - 24

12 times - 7 = 12+-24

-84 = - 12

And that's how to check it basically.

krek1111 [17]3 years ago

5 0

Answer:

Plug in your variables value.

Step-by-step explanation:

For your case, plug in -6 into the y slot

12(5+2y)= -(6-9y) +4y

12(5+2x-6)= -(6-9x-6)+4y see if that works!

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Considere as seguintes afirmações: I. O inverso de 0,2 é 5. II. O triplo de \frac{2}{5} é \frac{6}{15}. III. A metade de 0,5 é \

Alex777 [14]

Answer:

I e III

Step-by-step explanation:

Recebemos declarações na questão acima para considerar.

Declaração I. O inverso de 0,2 é 5.

Matematicamente, isso é escrito como:

1 / 0,2

0,2 = 2/10

Portanto: 1 ÷ 2/10 = 1 × 10/2

= 5

Afirmação 1 é verdadeira

Declaração II.

O triplo de 2/5 é 6/15.

Triplo de 2/5 = 2/5 + 2/5 + 2/5

= 2 + 2 + 2/5

= 6/5

= 1 1/5

Declaração II é falsa

III. A metade de 0,5 é 1/5

1/2 de 0,5

= 1/2 × 0,5 = 0,25

Convertendo em fração

= 0,25 = 25/100

= 1/4

Declaração III está correta

Portanto, as afirmações verdadeiras são I e III

8 0

3 years ago

Which expression represents the following statement: x is no less than 0. x>0 x≤0 x≥0 x<0

ki77a [65]

Answer: x ≥ 0

Step-by-step explanation:

First, let's define the symbols used:

a < x (this means that a is strictly smaller than x)

a > x (this means that a is strictly larger than x)

a ≤ x (this means that a is smaller than or equal to x)

a ≥ x (this means that a is larger than or equal to x)

Now we have the statement "x is no less than 0"

Then x can be equal to zero, or larger than zero, but never smaller than zero.

Looking at the symbols above, we know that we need to use:

x ≥ 0

(this is equivalent to the statement)

7 0

3 years ago

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How to find the area only of a triangle

strojnjashka [21]

Measure 2 sides, then multiply them, and divide by 2.

6 0

3 years ago

Find the sum of the measures of the interior angles of a convex 45-gon.

stiks02 [169]

Answer: 7740

Step-by-step explanation: take 180(n-45) and n represents the sides

7 0

3 years ago

What is the area of a sector with a central angle of 8 π/11 radians and a radius of 7.2 ft? use 3.14 for π and round your final

coldgirl [10]

Answer:

$59.19 ft^2$

Step-by-step explanation:

step 1

Find the area of the circle

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=7.2\ ft$

$\pi =3.14$

substitute

$A=(3.14)(7.2)^{2}$

$A=162.78\ ft^2$

step 2

we know that

The area of a circle subtends a central angle of 2π radians

using proportion

Find out the area of a sector with a central angle of 8 π/11 radians

$\frac{162.78}{2\pi }\frac{ft^2}{rad} =\frac{x}{(8\pi/11)}\frac{ft^2}{rad} \\\\x=162.78(8/11)/2\\\\x=59.19\ ft^2$

7 0

4 years ago