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GrogVix [38]
3 years ago
6

Each year for 3 years, the time it takes to run a mile decreases by 7 seconds.

Mathematics
1 answer:
cricket20 [7]3 years ago
4 0

Answer:

21

Step-by-step explanation:

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Solve each compound inequality (show your work!)
zimovet [89]

Answer:  -1 < x < 8

                x = 3

                x ≠ 2

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

Isolate x in the middle.  Perform operations to all 3 sides.

-6 < 2x - 4 < 12

<u>+4 </u>   <u>      +4</u>   <u>+4 </u>

-2 < 2x       < 16

<u>÷2  </u>  <u>÷2      </u>   <u> ÷2 </u>

-1   <   x       <  8

**************************************************************************

Isolate x.  Solve each inequality separately. Remember to flip the sign when dividing by a negative.

       4x ≤ 12       and       -7x ≤ 21

      <u>÷4  </u>  <u>÷4 </u>                 <u> ÷-7  </u>   <u>÷-7 </u>

        x ≤ 3         and         x ≥  3

Since it is an "and" statement, x is the intersection of both inequalities.

When is x ≤ 3 and ≥ 3?    <em>when x = 3</em>

****************************************************************************

Isolate x.  Solve each inequality separately.

    15x > 30       or           18x < -36

   <u>÷15 </u>  <u> ÷15 </u>                  <u> ÷18  </u>   <u>÷18 </u>

       x > 2          or              x <   2

Since it is an "or" statement, x is the union of both inequalities.

When we combine the inequalities, x is every value except 2.

x ≠ 2

4 0
3 years ago
-3[2-(y-5)]-4[3(y+1)-(6-y)(-2)]
Natalka [10]

Answer:

−y−81

Step-by-step explanation:

8 0
3 years ago
Directions: Tell whether the following are characteristics of stocks or bonds. Write stock or
Goshia [24]

Answer:

I need help with my question. can someone help me

4 0
3 years ago
The radius of the circle is 7 cm. What is the area of the shaded part? Use π = 227​
Ghella [55]

Answer:

227 * 7^2

Put into calculator

Step-by-step explanation:

Area of a circle is pi * r^2 (pi times radius squared)

Just put the numbers in

227 * 7^2

Put into calculator and there you go

3 0
3 years ago
ade wants to verify that the expression 5(3x – 6) is equivalent to 15x – 30. She substitutes 2 into each expression and evaluate
Scorpion4ik [409]

She will know if 5(3x - 6) is equivalent to 15x - 30 if they end up to be equal to the same number.


5(3x - 6)    Substitute 2 into x

5(3(2) - 6)

5(6 - 6) = 5(0) = 0


15x - 30

15(2) - 30

30 - 30 = 0


They both equal 0 when 2 is substituted in, so they are equivalent.


Also if you distributed 5 into (3x - 6) it would equal 15x - 30

5 0
3 years ago
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