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disa [49]
3 years ago
11

I need help with these four questions

Mathematics
1 answer:
ladessa [460]3 years ago
4 0
8. C 9. B 10. C

Can't see 7 that well
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I need help ASAP yikes
yKpoI14uk [10]

Answer:

X=-2

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The equation 5x - 7(x-1) = ax+b has exactly one solution.
Dimas [21]

Answer:

a = -2  and  b = 7

Step-by-step explanation:

We need to solve for the value of "a" and "b".

We need to distribute and make the left side of the equation same form as the right side of the equation and match the coefficients, simple.

We will use the distributive property shown below to expand the left side and simplify.

<u>Distributive Property:</u>  a(b-c) = ab - ac

Now, simplifying left hand side:

5x - 7(x - 1)

= 5x -7(x) -7(-1)

= 5x -7x +7

= -2x + 7

The right hand side is "ax + b".

If we match left-hand side and right-hand side, we see that:

a = -2

and

b = 7

THese are the only solution.

8 0
3 years ago
Solve for the rate in the eqution d=rt
Zolol [24]

Answer:

<em>The rate of the equation is r when r is a constant</em>

Step-by-step explanation:

     We need to solve for the rate of the equation  

     d = rt

     Differentiating on both sides with respect to time

     \frac{\mathrm{d} d}{\mathrm{d} t} = \frac{\mathrm{d} rt}{\mathrm{d} t}

      Considering r as a constant

       \frac{\mathrm{d} d}{\mathrm{d} t} =  r×\frac{\mathrm{d} t}{\mathrm{d} t}

      where, \frac{\mathrm{d} t}{\mathrm{d} t} = 1

       \frac{\mathrm{d} d}{\mathrm{d} t} = r

     <em>  The rate of the equation is r when r is a constant</em>

<em>        </em>

5 0
3 years ago
Write a unit rate for the situation.<br>18 necklaces made in 3 hours ​
kumpel [21]

8 = 3x would be your answer

Have a good day :)

5 0
3 years ago
Please help thank you
Alex

I don’t know it is really hard to learn
8 0
3 years ago
Read 2 more answers
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