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mylen [45]
3 years ago
11

Decide whether x=2 is a solution of x square+4x-12=0

Mathematics
1 answer:
hjlf3 years ago
7 0

Answer:Yes, it is


Step-by-step explanation:

2^2+4(2)-12=0

4+8-12=0

12-12=0

0=0

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Which is the solution set of the compound inequality 3.5x-10>-3and 8x-9<39
dimulka [17.4K]

So to solve for an inequality, you must isolate the variable, in this case x, to one side.

Starting with 3.5x - 10 > -3, firstly add both sides by 10:

3.5x > 7

Next, divide both sides by 3.5 and your first half is:

x > 2

Next with 8x - 9 < 39, firstly add both sides by 9:

8x < 48

Next, divide both sides by 8 and your second half is:

x < 6

<u>Putting it together, your final answer is x > 2 and x < 6 or 2 < x < 6.</u>

8 0
4 years ago
Solve for x 4^x-2=256
salantis [7]
We can do this problem using two ways....
Let me show you both methods.

<u>Method 1: "Without using logs"</u>

4^{x-2}=256\\\\  4^{x-2}=4^4\ \ \ \ \ |\because 4^4 \ $is the same as 256

Now, since both sides of the equation have same base and they equal each other, then their exponent must be equal to each other. So, we equal their exponents. 

After equaling the exponents, we get,
x - 2 = 4 \\\\ x=4+2 \\\\ \boxed{x = 6} \Leftarrow $ This is your answer!!

Now,
<u>Method 2: "Using Logs"</u>

4^{x-2}=256 \\\\ ~~~~~~~\Downarrow   ~~~~~~ is\ the\ same\ thing\ as\ saying \\\\$log\ _4\ 256 =x-2 \\\\ Now,\ using\ the\ log\ property\ log_AB= \frac{log_cA}{log_cB}, \ we \ get, \\\\  \frac{log_{10}256}{log_{10}4}=x-2 \\\\ 4=x-2 \\\\ 4+2=x\\\\ 6=x \\\\ \boxed{x=6} \Leftarrow $This is your answer



<u>So, either way we get x= 6</u>
8 0
3 years ago
Read 2 more answers
A quadrilateral has vertices A{11, -7), B(9,-4), C11,-1), and D(13,-4).
Bess [88]

Answer:

Quadrilateral ABCD is a <u>parallelogram</u>

if the vertex C( 11, -1 ) we’re shifted to the point C ( 11, 1 ), quadrilateral ABCD would be a <u>kite</u>

Step-by-step explanation:

without solving, im guessing that quad ABCD is a paralellogram (//gram)

lets test this theory

see if the slope of AB and CD, and BC and AD is the same

slope AB and CD

AB:

-7--4/11-9

=-3/2

CD:

-1--4/11-13

=3/-2

=-3/2

slope is the same

slope BC and AD

BC:

-4--1/9-11

=-3/-2

=3/2

AD:

-7--4/11-13

=-3/-2

=3/2

slope is same

because 2 pairs // sides ---> //gram

if the vertex C( 11, -1 ) we’re shifted to the point C ( 11, 1 ), quadrilateral ABCD would be a kite

hope this helps!

please mark brainliest thank you !

4 0
3 years ago
Instructions: Complete each question by choosing or typing in the best answer.
vladimir2022 [97]
I believe the answer to this question is A
5 0
4 years ago
Lionel is planning a one-day outing.
vaieri [72.5K]

For this case, the first thing we must do is define variables.

We have then:

x: number of rides

y: total cost

We now write the equations for each park.

For The Thrill amusement park:

y = 5x + 40

For The Splash water park:

y = 3x + 60

Answer:

A system of equations that could be used to determine the solution where the cost per ride of the two amusement parks, and, is the same is:

y = 5x + 40

y = 3x + 60

6 0
3 years ago
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