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algol [13]
3 years ago
7

Math question guys!! thanks

Mathematics
1 answer:
makkiz [27]3 years ago
8 0
I hope it can help you hehehehe

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A. Fill in the boxes :
frosja888 [35]

Step-by-step explanation:

it's simple:

  • 8 tens + 19ones = 9 tens + 9 ones
  • 8 tens + 2 ones =7 tens+12 ones
  • 7 tens +25 ones = 9 tens + 5 ones
  • 70+11=80+1
  • 50+13=60+3
  • 90+13=100+3
5 0
3 years ago
Ryan, Jessica, and Mark each solved this system of equations. All of their answers are different. Find and explain the mistakes.
Vika [28.1K]
6x - 2y = 10
-2y = -6x + 10...reduce by dividing by -2
y = 3x - 5....slope = 3 and y int = -5

y = 3x + 2 ...slope = 3, y int = 2

These lines are parallel. Parallel lines will have the same slope, but different y int's. There is no solution to this because ur lines never intersect.

Mark's answer is correct
6 0
3 years ago
Read 2 more answers
Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately normally
Dafna1 [17]

Answer:

a) 0.0869 = 8.69% probability that the thickness is less than 3.0 mm

b) 0.0668 = 6.68% probability that the thickness is more than 7.0 mm

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 4.9, \sigma = 1.4

(a) the thickness is less than 3.0 mm

This is the pvalue of Z when X = 3.

Z = \frac{X - \mu}{\sigma}

Z = \frac{3 - 4.9}{1.4}

Z = -1.36

Z = -1.36 has a pvalue of 0.0869

0.0869 = 8.69% probability that the thickness is less than 3.0 mm

(b) the thickness is more than 7.0 mm

This is 1 subtracted by the pvalue of Z when X = 7. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{7 - 4.9}{1.4}

Z = 1.5

Z = 1.5 has a pvalue of 0.9332

1 - 0.9332 = 0.0668

0.0668 = 6.68% probability that the thickness is more than 7.0 mm

5 0
3 years ago
4x=2 solve for X<br><img src="https://tex.z-dn.net/?f=4x%20%3D%202%20solve%20for%20x" id="TexFormula1" title="4x = 2 solve for x
Bogdan [553]
X=1/2 hope this helps <3
3 0
3 years ago
Read 2 more answers
Lauren bought 5 pizzas for $17 each. She paid with a $100 bill.
Lelechka [254]
The first blank is 17
2nd blank is 85
3rd blank is 15

wat happened is
C=paid-costofpizzas
paid=100
costofpizzas=number of pizzas times cost per pizza
costofpizzas=5 times 17

so
C=100-5 times 17
C=100-85
C=15
change=$15
6 0
3 years ago
Read 2 more answers
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