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Cloud [144]
3 years ago
10

So how would you break down the problem(2x-5)^2=49

Mathematics
2 answers:
BigorU [14]3 years ago
4 0
First, simplify the equation.

4x2−20x+25=<span>49
</span>
Step 2: Subtract 49 from both sides.

<span><span>4x2−20x+25</span>=<span>49 - 49

</span></span><span><span>4x2−20x</span>−24 </span>=<span>0
</span>
Step 3: Factor left side of equation.

<span><span><span>4<span>(x+1)</span></span><span>(x−6)</span></span>=<span>0

</span></span>Step 4: Set factors equal to 0.

<span><span><span>x+1</span>=<span><span><span>0<span> or </span></span>x</span>−6</span></span>=0

Your answers:
</span><span><span>x=<span>−<span><span>1<span> or </span></span>x</span></span></span>=6</span><span>
</span><span>

</span>
ivanzaharov [21]3 years ago
3 0
To solve this you first expand the brackets.
4x^2 - 20x + 25 = 49
Then make it equal 0.
4x^2 - 20x - 24 = 0
Now solve the quardratic.

x^2 - 5x - 6 = 0
(x - 6)(x + 1) = 0
x = 6 or x = -1
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create a linear function f(x), whose graph has the given slope that meets the given condition. slope of -7, f(-5)=2
sergejj [24]
Our goal is to fit the given information into the slope-intercept form.
y=mx+b

We can place the slope in 'm.'
y= -7x+b

Then, input the values for the x and y.
2= -7(-5)+b
2=35+b
b=2-35
b= -33

'b' is the intercept, so now that we know that, we can plug in all the values and find our final equation.

y= -7x -33

8 0
3 years ago
Multiple Choice
mihalych1998 [28]

Answer:

D is correct

Step-by-step explanation:

A graph of that sort will make a perfectly mirrored "V" shape, and with no offset, the bottom point will be on the y axis.  This means that the first equation will intercept the y axis at zero, the second will intercept the y-axis at -15.

"A" may seem correct also, as the second graph will intercept the x-axis at -15, but it is not complete, as it will intercept that axis at +15 as well.

7 0
2 years ago
11x - ? = 19x what is the missing number?
Verdich [7]

Answer:

8x !

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
The probability of drawing a heart from a standard deck of cards is 0.25. You record the car do you draw and return the car befo
Licemer1 [7]

Answer: C) 0.112

Step-by-step explanation:

In binomial distribution with parameters n (Total trails) and p (probability of getting success sin each trial) , the probability of getting success in x trials is given by :-

P(X=x)=^nC_xp^x(1-p)^{n-x}

Given : The probability of drawing a heart from a standard deck of cards is 0.25

Here , getting heart is the success.

Then p= 0.25

For n= 20

The probability that you will draw a heart seven times i.e. x= 7:

P(X=7)=^{20}C_7(0.25)^7(1-0.25)^{20-7}

P(X=7)=\dfrac{20!}{7!(20-7)!}(0.25)^7(1-0.25)^{20-7}\ \ [\because\ ^nC_r=\dfrac{n!}{r!(n-r)!}]

=\dfrac{20\times19\times18\times17\times16\times15\times14\times13!}{7!13!}(0.25)^7(0.75)^{13}\\\\=77520(0.00006103515625)(0.0237572640181)\\\\=0.112406195476\approx0.112

Hence, the probability that you will draw a heart seven times = 0.112

Thus , the correct answer is C) 0.112 .

8 0
3 years ago
14 = 31.7 – 3x What is the solution
netineya [11]
14 = 31.7 - 3x
-17.7 = -3x
x = 5.9


4 0
3 years ago
Read 2 more answers
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