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goldfiish [28.3K]
4 years ago
6

There are 18 boys in class. There are w fewer boys than girls. How many students are there in the class?

Mathematics
1 answer:
Alexxandr [17]4 years ago
4 0
The correct answer is s=36+w
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Select all the expressions ​
enot [183]

Answer:

B, C, E

Step-by-step explanation:

Answer choice A):

$300 ×  = $75

* This answer choice represents the calculation of discount only and not the final selling price of the bicycle.

Answer choice B):

$300 ×  = $225

* This answer choice represents the calculation of the final selling price of the bicycle.

Answer choice C)

$300 × (1 - ) = $225

* This answer choice represents the calculation of the final selling price of the bicycle.

Answer choice D):

$300 - 1/4

*This answer choice shows an incorrect equation which neither represents the calculation of the discount nor the final selling price of the bicycle.

Answer choice E):

$300 -  × $300

Applying the rule of PEMDAS,

We start with division; 1 ÷ 4 = 0.25

Then we go to multiplication; 0.25 × $300 = $75

Finally we do the subtraction; $300 - $75 = $225

* This answer choice represents the calculation of the final selling price of the bicycle.

4 0
3 years ago
3 x a x 2 x b please tell me the answer if you know it
nevsk [136]

Answer:

6ab

Step-by-step explanation:

3 x a x 2 x b

= 3 x 2 x a x b      ( because multiplication is commutative, which basically means you can move the  numbers and variables anywhere in the expression).

= 6ab     ( we leave out the multiplication signs. They are understood.)

4 0
3 years ago
What is the simplified form of 3/4x+3+21/8x^2-14x-15
creativ13 [48]

Solution:

We have been asked to find the simplified expression of

3/4x+3+21/8x^2-14x-15=\frac{3}{4x+3} +\frac{21}{8x^2-14x-15}\\ \\ \text{We will have to make the denominator equal to add}\\ \\ \ 8x^2-14x-15=8x^2+6x-20x-15\\ \\ \ =2x(4x+3)-5(4x+3)=(4x+3)(2x-5)\\ \\  \frac{3}{4x+3} +\frac{21}{8x^2-14x-15}=\frac{3}{4x+3} +\frac{21}{(4x+3)(2x-5)}\\ \\ =\frac{3(2x-5)+21}{(4x+3)(2x-5)}\\ \\ =\frac{6x-15+21}{(4x+3)(2x-5)} \\ \\ =\frac{6x+6}{(4x+3)(2x-5)} \\

6 0
3 years ago
Solve 7+x-15=2 over 2/3
4vir4ik [10]

Answer:

x=\frac{32}{3}

​​

4 0
3 years ago
Give all possible names for the line shown.
Nady [450]

Answer:

CD with the line bar over it ↔

DC with the line bar over it ↔

Step-by-step explanation:

There are two possible names for the line

CD with the line bar over it ↔

DC with the line bar over it ↔

We need the line bar over it to indicate it is a line and not a line segment.  A line goes on infinitely in both directions while a line segment stops

5 0
3 years ago
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