All categories

3 years ago

4x+5=45 (Show work to get brainliest) A) 5 B) 10 C) 15 D) 20

Mathematics

2 answers:

solmaris [256]3 years ago

6 0

Answer: x = 10

Step-by-step explanation: To solve for x in the equation you see here, our goal is to get x by itself on one side of the equation.

Our first step will be to isolate the term containing x which in this case is 4x. To isolate 4x, we have to get rid of the +5 by subtracting 5 from both sides of the equation.

On the left, +5 -5 cancels and we're left with 4x. On the right, 45 - 5 simplifies to 5.

So our equation now reads 4x = 40.

To get x by itself since it's being multiplied by 4, we just divide both sides of the equation by 4. On the left, the 4's cancel and we're left with x. On the right, 40/4 simplifies to 10 so our answer is x = 10.

jasenka [17]3 years ago

3 0

Answer:

B) 10

Step-by-step explanation:

4x+5=45

-5 -5

4x=40

/4 /4

x=10

You might be interested in

Solve: 2x-10= 40 Solve for X

Arturiano [62]

The correct answer is B

4 0

2 years ago

Read 2 more answers

notka56 [123]

Answer:

yes razi is correct pateran 3

Step-by-step explanation:

8 0

3 years ago

These dot plots show the heights (in feet) from a sample of two different types of elephants Asian Elephants . 5 10 11 12 14 15

Anvisha [2.4K]

Answer:

B - Centers: The Asian elephants have a lower median height than the African elephants

D - Spreads: The heights of the African elephants are more spread out

Step-by-step explanation:

7 0

2 years ago

What is the slope-intercept form of a linear equation? explain why this form is called the slope-intercept form?

Leviafan [203]

The slope-intercept form of a linear equation is y=mx+b. m being the slope (part one of name) and b being the y-intercept (part 2 of name).

5 0

3 years ago

If x^2+1/x^2=3 find the value of x^2/(x^2+1)^2 Express answer as a common fraction. Thanks!!

timama [110]

$x^2+\dfrac1{x^2}=3\implies x^4+1=3x^2\implies x^4-3x^2+1=0$

By the quadratic formula,

$x^2=\dfrac{3\pm\sqrt5}2\implies x^2+1=\dfrac{5\pm\sqrt5}2$

Then

$(x^2+1)^2=\dfrac{25\pm10\sqrt5+5}4=\dfrac{15\pm5\sqrt5}2$

$\implies\dfrac{x^2}{(x^2+1)^2}=\dfrac{\frac{3\pm\sqrt5}2}{\frac{15\pm5\sqrt5}2}=\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}$

Multiply numerator and denominator by the denominator's conjugate:

$\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}\cdot\dfrac{15\mp5\sqrt5}{15\mp5\sqrt5}=\dfrac{45\pm15\sqrt5\mp15\sqrt5-25}{15^2-(5\sqrt5)^2}=\dfrac{20}{100}=\dfrac15$

3 0

3 years ago