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olasank [31]
3 years ago
9

QUESTION 20

Mathematics
1 answer:
anygoal [31]3 years ago
8 0

Answer:

it B

Step-by-step explanation:

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4. It takes Zack 30 minutes to walk 7.5 blocks to the swimming pool. At this rate, how many blocks can he walk in
inna [77]

Answer:

He can walk 0.25 blocks in 1 minute

Step-by-step explanation:

If Zack can walk 7.5 blocks in 30 minutes and we are looking for how many blocks he can walk in 1 minute, we will divide 7.5 by 30 as that will be the number of blocks per minute.

7.5/30 = 0.25

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The difference between two positive numbers , 12/(x + 1) and 12/x , 1. () Form an equation in x and show that it reduces to x ^
stiks02 [169]

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Step-by-step explanation:

12

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Keith_Richards [23]

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Step-by-step explanation:

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3 years ago
Read 2 more answers
4.7 x 10^-3___ 2^2<br> =<br> &lt;<br> &gt;
tekilochka [14]

Answer:

<     (less than)

Step-by-step explanation:

4.7*0.001 ___ 4

0.0047___4

0.0047 < 4

4 0
3 years ago
What is the vertex , x coordinates , and x intercepts of y=2x ^2 + 4x-30
Evgesh-ka [11]
<span>5.1 </span>     Find the Vertex of   <span>y = x2-2x-15

</span>Parabolas have a highest or a lowest point called the Vertex .   Our parabola opens up and accordingly has a lowest point (AKA absolute minimum) .   We know this even before plotting  "y"  because the coefficient of the first term, 1 , is positive (greater than zero).<span> 

 </span>Each parabola has a vertical line of symmetry that passes through its vertex. Because of this symmetry, the line of symmetry would, for example, pass through the midpoint of the two  x -intercepts (roots or solutions) of the parabola. That is, if the parabola has indeed two real solutions.<span> 

 </span>Parabolas can model many real life situations, such as the height above ground, of an object thrown upward, after some period of time. The vertex of the parabola can provide us with information, such as the maximum height that object, thrown upwards, can reach. For this reason we want to be able to find the coordinates of the vertex.<span> 

 </span>For any parabola,<span>Ax2+Bx+C,</span>the  x -coordinate of the vertex is given by  -B/(2A) . In our case the  x  coordinate is   1.0000 <span> 

 </span>Plugging into the parabola formula   1.0000  for  x  we can calculate the  y -coordinate :<span> 
 </span><span> y = 1.0 * 1.00 * 1.00 - 2.0 * 1.00 - 15.0
</span> or <span>   y = -16.000</span>
6 0
3 years ago
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