A number decreased by 18.8 is 77.2 what is the number

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

You just add 77.2 + 18.8

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Solve each of the following equations for x.a) 3x - 8 =29 b) 3 ( x - 8 ) = 28c) 3 (x - 8) + 17 =29 d) 7x + 12 = 3x - 8
expand and simplify this can you help (2x²−3x+4) ( x²+5x−7)

On a Saturday, the ratio of the amount of water used by household A to the amount of water use by household B was 13 : 5. Household A used 260 gallons of water for that day. Find the total amount of water used by the two household on that Saturday.

Answers

Answer:the total amount of water used by the two households on that Saturday is 360 gallons

Step-by-step explanation:

Let x represent the total amount of water used by the two households on that Saturday. On that Saturday, the ratio of the amount of water used by household A to the amount of water use by household B was 13 : 5. The total ratio is 13 + 5 = 18

The amount of water used by household A would be

13/18 × total amount of water.

The amount of water used by household B would be

5/18 × total amount of water.

Since household A used 260 gallons of water for that day, it means that

13/18 × x = 260

13x = 260×18 = 4680

x = 4680/13 = 360

Step-by-step explanation:

this is my answer I guess this will help

4x-6=x+9
Solve the equation show all steps

Answers

Answer:

x= 5

Step-by-step explanation:

4x-6=x+9

Move the -6 to the other side of the equation by adding 6 to each side.

4x-6 + 6 =x+9 + 6

4x = x+15

Now move the x on the right side of the equation to the left side of the equation by subtracting x from each side.

4x - x = x + 15 - x

3x = 15

Now to isolate the x, divide both sides of the equation by 3.

3x/3 = 15/3

x = 5

Check your answer by substituting x = 5 into the original equation:

4x-6=x+9

4(5) - 6 = 5 + 9

20 - 6 = 14

14 = 14 >>> so this answer, x=5, is correct.

Through any two points there is/are exactly ________ line(s).

Answers

Answer: Only one line is the correct answer.

Step-by-step explanation:

Through any two points, there is exactly 1 line segment.

As the definition of line states that line segment has exactly two end points.

And postulate (3) of Euclid states that through any two points there is exactly one line.

And it can't be extended to any limit,

As it has only two end points.

Hence, only one line is the correct answer.

one. that is the definition of a line.
Through any two points, there is exactly one line.

If h(x) = 5x − 3 and j(x) = −2x, solve h[j(2)] and select the correct answer below.17
23
−17
−23

Answers

sub 2 for x in j(x) and evalueate
then sub that result for x in h(x)

j(2)=-2(2)
j(2)=-4

now sub-4 for x in h(x)

h(-4)=5(-4)-3
h(-4)=-20-3
h(-4)=-23

answer is -23

PLEASEEE HELP. Solve x^3-7x^2+6x-42=0

Answers

factor by grouping

x^2(x-7) + 6(x-7) = 0 [took x^2 out of the first two and a 6 out of the last two]
(x-7)(x^2+6) = 0 [moved (x-7) out to the front]
x = -i sqrt(6) , i sqrt(6) , 7

only one real solution of x = 7

$x^(3) -7 x^(2) +6x-42=0$

$(x-7)$ is a factor since it is a factor of -42 and 7 is a solution for f(x) to equal 0.

$(x-7)(a x^(2) +bx+c)=0$

$(x-7)( x^(2) +bx+6)=0$

$-7 x^(2) +b x^(2) =-7 x^(2)$

$-7+b=-7$

$b=0$

$(x-7)( x^(2) +6)=0$

$x-7=0$

$x^(2) +6=0$

$x=7$ (only solution because you can't square root (-6))

What is 45% of 40 in part, whole, and percent?

Answers

The answer is eighteen.

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