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Bess [88]
3 years ago
10

When the solution to x2 − 11x + 5 is expressed as 11 plus or minus the square root of r, all over 2, what is the value of r? x e

quals negative b plus or minus the square root of b squared minus 4 times a times c, all over 2 times a
A.2
B.5
C.101
D.141
Mathematics
2 answers:
soldi70 [24.7K]3 years ago
4 0

Answer:

C = 101

Step-by-step explanation:

strojnjashka [21]3 years ago
3 0

Answer:

C 101

Step-by-step explanation:

x² - 11x + 5 = 0

[-(-11) +- sqrt(11² - 4(5))]/2

[11 +- sqrt(101)]/2

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Round to the tenths place .712 .665 .545
Artyom0805 [142]

.712 rounds to .7

.665  rounds to .7

.545 rounds to .5

5 0
3 years ago
Subtract 3x^2+7x-4 from 8x^2-6x+2
solong [7]

Answer:

5x^2-13x+6

Step-by-step explanation:

(8x^2-6x+2)-(3x^2+7x-4)

8x^2-3x^2-6x-7x+2-(-4)

5x^2-13x+2+4

5x^2-13x+6

3 0
3 years ago
Let g(x)=2x and h(x)=x^2+4 find the value. (hog)(a)
lisov135 [29]
In short, (h o g)(a) is just h(    g(a)    ).

so what we can do is simply get g(a) first and then plug that in h(x).

\bf \begin{cases}
g(x)&=2x\\
h(x)&=x^2+4\\
(h\circ g)(a)&=h(~~g(a)~~)
\end{cases}
\\\\\\
g(a)=2(a)\implies g(a)=2a
\\\\\\
h(~~g(a)~~)\implies h(~~2a~~)=(2a)^2+4
\\\\\\
h(~~2a~~)=(2^2a^2)+4\implies  h(~~2a~~)=4a^2+4
8 0
4 years ago
W-x=z make x the subject of the formula​
Makovka662 [10]

Answer:

x=w-z

add x to both sides   w=z+x

subtract z from both sides   w-z=x

5 0
3 years ago
MARKING BRAINLEST!!!!!!!!!
lapo4ka [179]

Answer:

A  3^4 * 3^-4 / 3^6

C 1 / 3^6

Step-by-step explanation:

( 3^2 * 3^-2)

-------------------  all the the power of 2

           3^3

First simplify the numerator

We know a^b* a^c = a^(b*c)

( 3^(2+-2))

-------------------  all to the power of 2

           3^3

( 3^(0))

-------------------  all to the power of 2

           3^3

( 3^(0))

-------------------  all to the power of 2

           3^3

We know a^b/ a^c = a^(b-c)

3^(0-3)  all to the power of 2

3^-3 all to the power of 2

3^-3 ^2

We know that a^b^c = a^(b*c)

3^(-3*2)

3^ -6

We know the negative exponent takes if from the numerator to the denominator

1 / 3^6

The other correct choice is A

3^4 * 3^-4 = 3^0 which is 1

1/3^6 is the same answer

8 0
4 years ago
Read 2 more answers
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