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Marat540 [252]
3 years ago
5

Read the problem and answer the questions show your solution when necessary. ​

Mathematics
1 answer:
Alexandra [31]3 years ago
4 0

Answer:

Step-by-step explanation:

1) Number of white chocolate bars = x

Number of dark chocolate bars = y

Total bars = 15

x + y = 15 --------------(I)

Total cost = Php. 340

20x + 25y = 340 ----------------(II)

2)  We can use elimination method to solve this equations.

Multiply equation (I) by (-20) and then add the equations.

(I)* (-20)          -20x  -20y = - 300

(II)                    <u>20x + 25y = 340 </u>     {Now add and x will be eliminated}

                                  5y = 40

                                    y = 40/5

y = 8

Substitute y = 8 in equation (I)

x + 8 = 15

      x = 15 - 8

x = 7

3) Number of dark chocolate bars = 8

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Answer:

\dfrac{3x+4}{2x-2}

Step-by-step explanation:

Invert and multiply the way you would any fraction division problem. Then cancel common factors from numerator and denominator.

\displaystyle\frac{\left(\frac{4x^2+2x}{x^2+x-2}\right)}{\left(\frac{8x^2+4x}{3x^2+10x+8}\right)}=\frac{4x^2+2x}{x^2+x-2}\cdot\frac{3x^2+10x+8}{8x^2+4x}\\\\=\frac{2x(2x+1)(3x+4)(x+2)}{4x(2x+1)(x-1)(x+2)}=\frac{3x+4}{2(x-1)}\\\\=\frac{3x+4}{2x-2}

4 0
3 years ago
Consider the function f(x) =2x-6 find f(2)
tester [92]

Step-by-step explanation:

✧ \underline{ \underline{ \large{ \tt{G \: I \: V \: E\: N}}} } :

  • f ( x ) = 2x - 6

✧ \underline{ \underline{ \large{ \tt{T\: O \:  \: F\: I\: N\: D}}}}:

  • value of f ( 2 )

✧ \underline{ \underline{ \large{ \tt{S \:O \: L \: U \: T \: I \: O \: N}}}} :

❀ \large{ \text{When \: x = 2 ,\: f}(2) = 2 \tt{ \times 2 - 6}}

⟼ \large{ \text{f(2) = 4 - 6 =  \boxed{ \large{ \text{ - 2}}}}}

♨ \boxed{ \boxed{ \large{ \text{OUR\: FINAL \: ANSWER :  \boxed{ \underline{ \bold{ \text{ - 2}}}}}}}}

Hope I helped ! ♡

Have a wonderful day / night ! ♪

Let me know if you have any questions regarding my answer! ☄

☃ \underline{ \underline{ \mathfrak{Carry \: On \: Learning}}} !! ♕

▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

4 0
2 years ago
White - 20 marbles
DochEvi [55]

Answer: d

Step-by-step explanation:

The probability of not being purple is the probability of the three other colors. Suppose the number of purple marbles is x. Then we have 20+30+40+x = 90 + x marbles. Then the probability of not being purple is 90/(90+x). If this fraction can have a lowest term for some value of x, then the numerator of this lowest term must be a factor of 90.

Checking through the options, only option D has a non-factor of 90 as its numerator.

8 0
3 years ago
The length of a rectangle is seven more than double the width. If the perimeter is 22 inches find the dimensions
lubasha [3.4K]

Answer:

width = 1 1/3 inches

length = 9 2/3 inches

Step-by-step explanation:

let 'w' = width

let '7+2w' = length

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8 = 6w

w = 4/3 or 1 1/3

substitute 1 1/3, or 4/3, to find length:

l = 7 + 2(4/3)

l = 7 + 8/3 or 9 2/3

7 0
3 years ago
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