???? i am confusion ????

Answers

Answer 1

Answer:

Answer:

x = 4.8

Step-by-step explanation:

$(x)/(-12)=-0.4\qquad\text{multiply both sides by (-12)}\n\n-12\!\!\!\!\!\diagup^1\cdot(x)/(-12\!\!\!\!\!\diagup_1)=(-12)(-0.4)\n\nx=4.8$

Answer 2

Answer:

Answer:

X=4.8

Step-by-step explanation:

Isolate x on one side of the equation.

x/-12=-0.4

x(-12)/-12=(-0.4)(-12) (First, multiply by -12 from both sides.)

(-0.4)(-12) (Solve.)

(-0.4)(-12)=4.8

x=4.8

So, the final answer is x=4.8.

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a) six pens and five pencils cost $2.50 while three pens and two pencils cost $1.15 . what will be the cost of a pen and 4 pencils . please help me

Answers

x - pen
y - pencil

$6x+5y=2.5\n 3x+2y=1.15\n\n 6x+5y=2.5\n -6x-4y=-2.3\n --------\n y=\$0.2\n\n 6x+5\cdot0.2=2.5\n 6x+1=2.5\n 6x=1.5\n x=\$0.25\n \nx+4y=0.25+4\cdot0.2=\boxed{\$1.05 }$

Let pen's cost be x and pencil's cost be y.

6x + 5y = 2.50
3x + 2y = 1.15

Thus, 3x = 1.15 - 2y
Therefore, 6x = 2.30 - 4y

Substituting the value of 6x ;

(2.30 - 4y) + 5y = 2.50

or, 2.30 + y = 2.50

=> y = 0.20.

Substituting the value of y ;

6x = 2.30 - 4(0.20)
6x = 2.30 - 0.80 = 1.5
6x = 1.5
=> x = 0.25

Thus, 1 pen costs 0.25 $ and 1 pencil costs 0.20$.

Thus, cost of one pen is 0.25$.
Cost of 4 pencils is 0.80 $

0.25$ + 0.80$ = 1.05$

What mutiplication equals to 1400

Answers

140 x 10 equals 1400 and 70 x 20 equals 1400

The answer is 200 and 700 either of them would be the right answer.

For Example 2x7=14 but when you multiply 700x2=1400 or 200x7=1400.

If you don't understand ty dividing 1400 to 2 it will equal 700.

Thank you for asking have a great day.

What is the probability that a month picked at random will have 31 days? A.5/12
B.4/12
C.7/12
D.8/12

Answers

There are 12 months. 7 of them have 31 days (Jan, Mar, May, July, Aug, Oct, Dec). 4 of them have 30 days (Apr, June, Sep, Nov). 1 of them has 28 or 29 days (Feb). Based on this knowledge, the probability of picking a month with 31 days at random is C, 7/12.

Solve the model 1/3+1/3=

Answers

1/3 + 1/3 = 2/6 2/6 is the answer.

The answer is 2/6 because 1/3+1/3=2/6

Isiah determined that 5a2 is the GCF of the polynomiala3 – 25a2b5 – 35b4. Is he correct? Explain.

Answers

ok, easy way is that we divide each term by the GCF and if it doesn't divide evenly, then it is not valid

first one
5a^2 divide by a^3
we see that we cannot since the power is higher and there is no 5 so it is not the GCF

The equation of the perpendicular line

Answers

Answer:

Step-by-step explanation:

First we need to find the point that the perpendicular line goes through on this line segment. The problem says it's a perpendicular bisector, which means it goes through the middle of the line, which means the point it goes through is halfway between (4, 4) and (-8, 8). This point would be (-2, 6).

Next, we need to find the slope of the perpendicular line. We know that if the slope of the line segment we're given is $m$ , then the slope of the line perpendicular to this line segment is $(-1)/(m)$ .

The slope of the line segment can be found by the following:

$(8 - 4)/(-8 - 4)$

$(4)/(-12)$

$(-1)/(3)$

This means that the slope of the perpendicular line is 3.

The equation of a line is $y = mx + b$ , were $m$ is the slope and $b$ is the Y-intercept.

We know the slope, we so we just need to determine the Y-intercept. To do so, we can plug in a point that we know the line goes through, (-2, 6), and solve for $b$ :

$6 = (3)(-2) + b$

$6 = -6 + b$

$b = 12$

Finally, the equation of the line is

$y = 3x + 12$