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3 years ago

ASAP!!!!!!! PLEASE HELP!! Without solving, what can you tell about the solution to this equation?

2 answers:

5 0

Both sides are equal to each other. Hence, infinite solutions for this equation.

$\dfrac{1}{2} (b + 14) = \dfrac{b + 14}{2}$

Hope this helps. - M

BartSMP [9]3 years ago

3 0

That both sides are equal no matter what the value of b is, it would be equal, b/c both of those sides are being halved. infinite solutions

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The sum of two numbers is 36. Four times the smaller is one less than the larger. Find the numbers

Svetllana [295]

12 and 3 because 3 divided by 12=4 and 12x3=36

8 0

2 years ago

Bryan’s monthly electric bill is determined by adding a flat administration fee to the product of the number of kilowatt hours o

rewona [7]

We will form the equations for this problem:

(1) 1100*y + z = 113

(2) 1500*y + z = 153

z = ? Monthly administration fee is notated with z, and that is the this problem's question.

Number of kilowatt hours of electricity used are numbers 1100 and 1500 respectively.

Cost per kilowatt hour is notated with y, but its value is not asked in this math problem, but we can calculate it anyway.

The problem becomes two equations with two unknowns, it is a system, and can be solved with method of replacement:

(1) 1100*y + z = 113

(2) 1500*y + z = 153

----------------------------

(1) z = 113 - 1100*y [insert value of z (right side) into (2) equation instead of z]:

(2) 1500*y + (113 - 1100*y) = 153

-------------------------------------------------

(1) z = 113 - 1100*y

(2) 1500*y + 113 - 1100*y = 153

------------------------------------------------

(1) z = 113 - 1100*y

(2) 400*y + 113 = 153

------------------------------------------------

(1) z = 113 - 1100*y

(2) 400*y = 153 - 113

------------------------------------------------

(1) z = 113 - 1100*y

(2) 400*y = 40

------------------------------------------------

(1) z = 113 - 1100*y

(2) y = 40/400

------------------------------------------------

(1) z = 113 - 1100*y

(2) y = 1/10

------------------------------------------------

if we insert the obtained value of y into (1) equation, we get the value of z:

(1) z = 113 - 1100*(1/10)

(1) z = 113 - 110

(1) z = 3 dollars is the monthly fee.

credit: freesparrow

4 0

3 years ago

Read 2 more answers

The Line graph shows the number of marks Stacey scorer in her homeworks.

weqwewe [10]

Given:

The line graph shows the number of marks Stacey scored in her homeworks.

We need to determine the Stacey's mean score.

Mean score:

The total number of marks is given by

$(0\times 4)+(1 \times 5)+(2\times 3)+(3\times 4)+(4 \times 3)+(5 \times 1)$

Simplifying, we get;

$0+5+6+12+12+5=40$

Thus, the total number of marks is 40.

Sum of the number of marks scored is given by

$4+5+3+4+3+1=20$

Thus, the sum of the marks scored is 20.

The mean is given by

$Mean=\frac{40}{20}$

$Mean=2$

Therefore, Stacey's mean score is 2 marks.

4 0

3 years ago

Which value is an input of the function? -14 -2 0 4

creativ13 [48]

Answer:

Only answer on the x-axis

6 0

3 years ago

Bethany,Lauren,Amanda,and David all meet at Family reunion. They are comparing their ages. They have found that Laura is 13 year

bazaltina [42]

The second system of equations,

$\left \{ {{y=\frac{x^2}{2}+\frac{13}{2}x} \atop {y=x^2-27x+129}}$
is correct.

We know that Bethany's age is x. Since Laura is 13 years older, her age is x+13. The product of their ages is equal to twice Amanda's age, and Amanda's age is y. This gives us:
x(x+13) = 2y

Using the distributive property, we have
x²+13x=2y

Dividing everything by 2 (to isolate y), we have:
x²/2 + (13/2)x = y

If we take 20 years off of Bethany's age, it is now represented as x-20. Taking 20 years off of Laura's age would be (x+13-20) or x-7. The product of their ages now is equal to David's age; David is 11 years older than Amanda, so his age is y+11. This gives us:

(x-20)(x-7)=y+11

Multiplying the binomials we have:"
x*x - 7*x - 20*x - 20(-7) = y+11
x²-7x-20x--140=y+11
x²-27x+140=y+11

To isolate y, subtract 11 from both sides:
x²-27x+140-11 = y+11-11
x²-27x+129 = y

7 0

3 years ago