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3 years ago

What is the simplified value of the expression below?

Mathematics

2 answers:

polet [3.4K]3 years ago

6 0

Answer:

C. 9

Step-by-step explanation:

Sonja [21]3 years ago

3 0

The simplified for is C. 9

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I need to know what is <br><img src="https://tex.z-dn.net/?f=%20-%2015%20%5Cdiv%203" id="TexFormula1" title=" - 15 \div 3" alt="

Slav-nsk [51]

The answer is -3 because mathematically -15 divided by 3 equals -3

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3 years ago

The sum of x and 3 times y is 5. The difference of x and y is 5. Write two equations and graph to find the value of y.

kupik [55]

Answer:

for the first one, x + 3 * y = 5

and the second equation, x - y = 5

Step-by-step explanation:

the sum of two numbers means for example the sum of 5 and 8 is 13, so as an equation that is 5 + 8 = 13

the difference is the same thing as the sum but it's subtraction.

and then times is just multiplication.

5 0

2 years ago

35,x,and (x+15) what is the equation

Serjik [45]

Answer:

what???!!!! I don't understand! you can writen again

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3 years ago

Solve the equation x+3/x-4 = x-5/x+4

Serga [27]

Answer:

$\large\boxed{x=\dfrac{1}{2}}$

Step-by-step explanation:

$\dfrac{x+3}{x-4}=\dfrac{x-5}{x+4}\\\\\text{Domain:}\ x-4\neq0\ \wedge\ x+4\neq0\\\\x\neq4\ \wedge\ x\neq-4\\\\D:x\in\mathbb{R}-\{-4,\ 4\}$

$\dfrac{x+3}{x-4}=\dfrac{x-5}{x+4}\qquad\text{cross multiply}\\\\(x+3)(x+4)=(x-4)(x-5)\qquad\text{use FOIL}\ (a+b)(c+d)=ac+ad+bc+bd\\\\(x)(x)+(x)(4)+(3)(x)+(3)(4)=(x)(x)+(x)(-5)+(-4)(x)+(-4)(-5)\\\\x^2+4x+3x+12=x^2-5x-4x+20\qquad\text{combine like terms}\\\\x^2+(4x+3x)+12=x^2+(-5x-4x)+20\\\\x^2+7x+12=x^2-9x+20\qquad\text{subtract}\ x^2\ \text{from both sides}\\\\7x+12=-9x+20\qquad\text{subtract 12 from both sides}\\\\7x=-9x+8\qquad\text{add}\ 9x\ \text{to both sides}\\\\16x=8\qquad\text{divide both sides by 16}\\\\x=\dfrac{8}{16}\\\\x=\dfrac{8:8}{16:8}\\\\x=\dfrac{1}{2}\in D$

7 0

3 years ago

Points E, F, and G are collinear. If EF = 8 and EG = 12, which point cannot lie between the other two?

Dima020 [189]

Point G can not be between

3 0

3 years ago