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3 years ago

Find the value of c that completes the square x sqaured+8x+c

Mathematics

1 answer:

Hunter-Best [27]3 years ago

7 0

Answer: The value of C would be 16,

Step-by-step explanation: If

x2 + bx + c is a perfect square, then there is always the same relation ship between

b and c

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Members of a senior class held a car wash to raise funds for their senior prom. They charged $3 to wash a car and $5 to wash a p

pashok25 [27]

Answer:the number of cars that were washed is 50

Step-by-step explanation:

Let x represent the number of cars that members of a senior class.

Let y represent the number of pick-up truck or a sport utility vehicle that members of a senior class.

They charged $3 to wash a car and $5 to wash a pick-up truck or a sport utility vehicle and they earned a total of $275. This means that

3x + 5y = 275 - - - - - - - - -- - -1

They washed a total of 75 vehicles. This means that

x + y = 75

Substituting x = 75 - y into equation 1, it becomes

3(75 - y) + 5y = 275

225 - 3y + 5y = 275

- 3y + 5y = 275 - 225

2y = 50

y = 50/2 = 25

Substituting y = 25 into x = 75 - y, it becomes

x = 75 - 25 = 50

3 0

3 years ago

Hurry. !!! The formula A = 6s' gives the surface

Tcecarenko [31]

Answer: A

Explanation: If the side length is 5, than 5•5=25

7 0

3 years ago

Perform the indicated operation. Be sure the answer is reduced.

Morgarella [4.7K]

The answer is: $k^{2} /2
$
The explanation is shown below:
1. You have the following expression given in the exercise above:
$( 4k^{2}) /(2k+3)(2 k^{2} -5k-12)/(8k-32)
$
2. By applying the distributive property, you obtain:
$(8k^{4}-20k^{3}-48k)/(16k^{2} -40k-96)$
3. Now, you must factor $k^{2}$ in the numerator and $2
$ in the denominator:
$k^{2}(8 k^{2} -20k-48)/2(8 k^{2} -20k-48)$
4. Simplify:
$k^{2} /2$

8 0

3 years ago

Anyone? please help asap i really want to finish this

den301095 [7]

Step-by-step explanation:

oh, come on ! one is finding the inequality itself, the other is solving it. you don't know the difference of that ?

if so, please let me know, what you don't understand of the following explanations, so that I can add whatever is necessary.

you know, what an equality (ahem, equation) is ?

both, equations and inequalities are like a balancing scale with usual different things on the two pans left and right.

an equation is when both sides are in balance. their weight is equal.

an inequality is, when one side is heavier than the other.

and you know, what a variable is ? it is a kind of placeholder for actual values. it is like keeping some space open on the scale pan with a list of conditions for what kind of things you can put in that open space, so that the status of the scale stays unchanged.

twenty less than a number is at least 15

looks mathematically

x - 20 >= 15 (larger or equal = "at least")

x - 20 >= 15

x >= 35

so, this is true for

{x € R | x >= 35}

{x € R | x = 35 or x > 35}

so, this is true for all real values of x that are at least 35.

4 0

2 years ago

Solve: 8+ x/2= 1/4 (x-4)-1

alexandr402 [8]

|3x+1|=4 : x=−
5
3 or x=1
Pasos
|3x+1|=4
Aplicar las propiedades de los valores absolutos: Pi |u| = a, a>0 entonces u = a or u = −a
3x+1=−4 or 3x+1=4
Mostrar pasos
3x+1=−4 or 3x+1=4

6 0

3 years ago