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xxTIMURxx [149]
3 years ago
10

Solve for x: 3|x - 3| + 2 = 14

Mathematics
2 answers:
astra-53 [7]3 years ago
3 0
D) is the correct one
dexar [7]3 years ago
3 0
I hope this helps you

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The answer is one.
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How many solutions are there<br><br><br>2x - y = 1<br>- 4x + y = 1​
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Help help ASAP math math
Anni [7]

Answer:

-25

Step-by-step explanation:

f(-12) means x = -12

so you just plug it in the equation and solve for x

f(x) = 3(-12)+11\\f(x) = -36+11\\f(x) = -25

7 0
2 years ago
Curtis threw darts at a dartboard. 40% of his darts hit the bulls-eye, If 6 darts hit the bulls-eye,how many did not hit the bul
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8 0
3 years ago
The makers of a smartphone have received complaints that the face recognition tool often doesn't work, or takes multiple attempt
cupoosta [38]

Answer:

Step-by-step explanation:

This is a test of 2 population proportions. Let 1 and 2 be the subscript for the new version and the old version. The population proportion of the time that the tool works for the new and old version would be p1 and p2 respectively.

p1 - p2 = difference in the proportion of the times that the tool works for the new and old version

The null hypothesis is

H0 : p1 = p2

p1 - p2 = 0

The alternative hypothesis is

H1 : p1 > p2

p1 - p2 > 0

it is a right tailed test

Sample proportion = x/n

Where

x represents number of success

n represents number of samples

For new version

p1 = 70/100 = 0.7

n1 = 80

x1 = n1p1 = 80 × 0.7 = 56

For old version,

p2 = 56/100 = 0.56

n2 = 75

x2 = n2p2 = 75 × 0.56 = 42

The pooled proportion, pc is

pc = (x1 + x2)/(n1 + n2)

pc = (56 + 42)/(80 + 75) = 0.63

1 - pc = 1 - 0.63 = 0.37

z = (p1 - p2)/√pc(1 - pc)(1/n1 + 1/n2)

z = (0.7 - 0.56)/√(0.63)(0.37)(1/80 + 1/75) = 0.14/0.07759993557

z = 1.8

Since it is a right tailed test, we will look at the area to the right of the z score on the normal distribution table to determine the p value. Therefore,

p = 1 - 0.9641 = 0.04

By using the p value,

Since 0.1 > 0.04, we would reject the null hypothesis. Therefore, at a significance level of 0.1, it can be concluded that the new version is performing better.

7 0
3 years ago
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