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inn [45]
3 years ago
11

If 2 inches equals 20 miles on a map, then how many inches will represent 120 miles

Mathematics
1 answer:
OverLord2011 [107]3 years ago
4 0

Answer:

12

2 inch = 20 means 1 inch = 10 so for 120 its 12

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Y = - 2x + 2<br> y = 7 8x - 5<br> Equations by substitution
qwelly [4]

Answer: {(-9/2, -41/2)} second option.

Step-by-step explanation:

7 0
4 years ago
On a recent Summative Assessment, the mean score for the Algebra 1 class was 72 and the standard deviation was 7. See the normal
Andreas93 [3]
<h3>Answer:   65</h3>

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

According to the empirical rule, roughly 68% of the normal distribution is within 1 standard deviation of the mean.

In this case, that tells us 68% of the population is between x = 65 and x = 79. The center is at mu = 72, which is the highest point. On either side of this center is where the curve goes downward as you move away from the center. Note the symmetry as well. Each tickmark represents 1 standard deviation unit.

Because 68% of the class got scores between x = 65 and x = 79, this means 100% - 68% = 32% of the class got a score x such that x < 65, or x > 79

Cut this in half and get (32%)/2 = 16%

16% of the population is in either tail.

16% of the population is the set of x values such that x < 65; we can say that 16% of the population is more than 1 standard deviation from the mean, and also smaller than the mean.

The 16th percentile is the marker where 16% of the population is below that value.

Therefore, the 16th percentile is the value <u>  65  </u>

16% of the class scored less than 65 on the test.

4 0
3 years ago
Determine the vertex by completing the square. Show process.<br><br> y = x2 -6x + 22
Vilka [71]

Answer:

(3,13)

Step-by-step explanation:

y=x^2-6x+22\\y=x^2-6x+22+3^2-3^2\\y=(x-3)^2+22-9\\y=(x-3)^2+13

Note that by vertex form we have:

y=a(x-h)^2+k

Where the vertex has the coordinates (h,k) so we change the sign of h and keep the same k value and so:

h=3 and k=13

Therefore the vertex of this parabola is: (3,13)

8 0
3 years ago
You buy clothing at a sale you buy sneakers at 2/3 of their original price of $60 a sweater at 7/10 of its original price of $35
ozzi

Answer:

a. We spent all together 40.2+24.5+37.8=$102.50.

b. We saved 19.8+10.5+7.2=$37.50

c. \frac{102.50}{140}

Step-by-step explanation:

To find the amount we spend, we multiply the original price by the decimal conversion of each fraction. Then we add the amounts together.

  • Sneakers cost $60 and you bought them at 2/3=0.6666....

60(0.67)=$40.20 and saved $19.80

  • Sweater costs $35 and you bought it at 7/10=0.7

35(0.7)=$24.50 and saved $10.50

  • A jacket costs $45 and you bought it at 5/6=0.8333...

45(0.84)=$37.80 and saved $7.20

We spent all together 40.2+24.5+37.8=$102.50.

We saved 19.8+10.5+7.2=$37.50

We could of spent paying regular price 60+35+45=$140. To find the fraction we place the total we actually paid over the total regular price.

\frac{102.50}{140}



6 0
4 years ago
Read 2 more answers
Plz help for 15 points
Whitepunk [10]

Answer:

multiplica

Step-by-step explanation:

6×6 y ya te sale da mejor puntuasion

5 0
3 years ago
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