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Ber [7]
2 years ago
7

How do I do these 2 questions

Mathematics
1 answer:
olga nikolaevna [1]2 years ago
3 0

Q10/

6 m/s = 21.6 km/h

6m/s =3.6 × 6 = 21.6 km/h

** 1m/s = 3.6 km /h

1 \frac{m}{s}  =  \frac{1}{1000} km \times  \frac{60s}{1 \: min}  \times  \frac{60 \: min}{ 1\: h}  \\  \\  =  \frac{1}{1000} \times  \frac{3600}{1}  \\  \\   = \frac{3600}{1000}  = 3. 6\: km/h

Q14/

7x -1 =3x+7

7x - 3x = 7 +1

4x =8

x = 8/4

x =2

I hope I helped you^_^

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Nimfa-mama [501]
The mistake she made was timesing the 6 by the -7.5 as there is no x after the 6
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ra1l [238]
<h3>Answer:   5</h3>

=================================================

Work Shown:

x^2 - 5x + 1 = 0

x^2 + 1 - 5x = 0

x^2 + 1 = 5x

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(x^2)/x + (1/x) = 5

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---------------

An alternative method involves solving the original equation using the quadratic formula. After you get the two roots x = p and x = q, you should be able to find that p + 1/p = 5 and also q + 1/q = 5 as well.

In this case,

p = (5 + sqrt(21))/2

q = (5 - sqrt(21))/2

8 0
2 years ago
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Which ordered pair is not a solution of f(x) = 2x + 9? (0, 9) (7, 23) (3, 14) (2, 13)
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3 years ago
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Solve for b. 4b-3b+7= 10
Morgarella [4.7K]

b = 3

Step-by-step explanation:

4b - 3b + 7 = 10

Add similar terms :

4b - 3b = b \\ b + 7 = 10

Collect like terms and simplify

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