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Alenkasestr [34]
3 years ago
9

After paying $5.12 for a salad, Norachai has $27.10. How much money did he have

Mathematics
2 answers:
miv72 [106K]3 years ago
5 0

Answer:

32.22

Step-by-step explanation:

maxonik [38]3 years ago
3 0

Answer: $32.22

Step-by-step explanation:

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Simplify <br><br> 6 ÷ 3 + 32 · 4 − 2
ella [17]

Answer:

128 <33

Step-by-step explanation:

5 0
1 year ago
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Refer previous problem. Suppose that you wish to estimate the difference between the mean acidity for rainfalls at two different
aivan3 [116]

Answer:

Hence,we need at least 136 rainfall PH values in the sample i.e

n ≥ 136

Step-by-step explanation:

We are given that:

(σ1)^2 = (σ2)^2 = Population variance = 0.25

So, E < 0.1

Confidence coefficient (c) = 0.9

n = n1 = n2

For confidence level, 1 - α = 0.9,we'll determine Z (α /2) = Z 0.05 by looking up 0.005 using the normal probability table which i have attached.

So, Z (α /2) = 1.645

The margin of error E is given as;

E = Z (α /2)√[(σ1)^2)/n1] + [(σ2)^2)/n2]

= Z (α /2)√({(σ1)^2 + (σ2)^2}/n) < 0.1

Multiply both sides by √n to get;

Z (α /2)√(σ1)^2 + (σ2)^2} < 0.1√n

Divide both sides by 0.1;

{Z (α /2)√(σ1)^2 + (σ2)^2}}/0.1 <√n

When we square each side, we get

{Z (α /2)√(σ1)^2 + (σ2)^2}}/0.1} ^2 < n

We'll now fill in the known values and solve;

n > ( 1.645 x √{(0.25 + 0.25)/0.1}^2

n > 135.3 or approximately n > 136

Hence,we need at least 136 observations in the sample i.e

n ≥ 136

7 0
3 years ago
Can someone Help me in this problem?
Fed [463]
If you have to write the equation then it would be "5k + 6.7"
5 0
3 years ago
{-5x+3y less than or equal to 45<br>{2x +3y&gt;24​
Softa [21]

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7

Step-by-step explanation:

6 0
3 years ago
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Can you please tell me how to solve this?
Sedaia [141]

The answer is 142°


Explanation:

angle 1 and angle 2 form are supplementary.

m∠1 + m∠2 = 180°

38° + m∠2 = 180°

m∠2 = 180° - 38°

m∠2 = 142°


Hope it helps!

5 0
3 years ago
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