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vagabundo [1.1K]
3 years ago
14

Any other thoughts i dont know which to choose

Mathematics
1 answer:
musickatia [10]3 years ago
3 0
He made his error in step 2 he already flipped 5/8 in step one then he flipped it again in step 2

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Una recta numérica de -6 + 4​
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Answer:

-2

Step-by-step explanation:

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3 years ago
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Find the solution(s) for x in the equation below. x^2 + 10x + 21= 0
Law Incorporation [45]

The solutions for ‘x’ in the given equation are – 3  and  - 7

<u>Step-by-step explanation:</u>

Given equation:

                   x^{2} + 10 x + 21 = 0

To find the ‘x’ value, try to factor, because in this case it works, it's fast. By using factor method, we get

                    (x + 3) (x + 7) = 0  (adding both value we get 10 and multiply as 21 as in equation and check with signs also while factoring)

                     x = - 3, -7

Verify above values by multiply both terms,

                     (x + 3) (x + 7) = 0

                x^{2} + 7 x + 3 x + 21 = 0

                x^{2} + 10 x + 21 = 0 (so values obtained from factor method are correct)

Or, can use quadratic formula, for a x^{2} + b x + c=0, the solutions are given by:

                      x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}

In the given equation, a = 1, b = 10, c = 21, apply these in above formula

                     x=\frac{-10 \pm \sqrt{10^{2}-(4 \times 1 \times 21)}}{2(1)}=\frac{-10 \pm \sqrt{100-84}}{2}

                     x=\frac{-10 \pm \sqrt{16}}{2}=\frac{-10 \pm 4}{2}

So,

When  x=\frac{-10+4}{2}=\frac{-6}{2}=-3

When x=\frac{-10-4}{2}=\frac{-14}{2}=-7

Hence, the values for ‘x’ are - 3 and - 7

7 0
3 years ago
Math,math,math,math,math,math
zzz [600]

Answer:

Step-by-step explanation:

MATHHHHHHHH do u need help in math or what?

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<span> i = prt
t = i/(pr)
.........................</span>
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4 years ago
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Multiply and subtract these polynomials and simplify. Enter your response in standard form.
a_sh-v [17]

Answer: use this website  https://www.symbolab.com/solver/polynomial-equation-calculator/%5Cleft(2x3%20%E2%88%92%203x%20%2B%2011%5Cright)%20%E2%88%92%20%5Cleft(3x2%20%2B%201%5Cright)%5Cleft(4%20%E2%88%92%208x%5Cright)

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