Find the m A. 100 B.143 C. 38 D. 25

Mathematics

1 answer:

Ainat [17]3 years ago

3 0

Answer:

143 degrees.

Step-by-step explanation:

m < A + m < B = 180 degrees. ( inside angles of a parallelogram). So:-

4x - 9 + x - 1 = 180

5x - 10 = 180

5x = 190

x = 38

So m < A = 4(38) - 9

= 143 degrees.

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In a random sample of 75 individuals, 52 people said they prefer coffee to tea. 99.7% of the population mean is between what two

marshall27 [118]

Sample size, n = 75
Point estimate, p = 52/75 = 0.693
Z at 99.7% confidence interval ≈ 2.96

Population mean interval = p+/- Z*Sqrt [p(1-p)/n]

Substituting;
Population mean interval = 0.693 +/- 2.96*Sqrt [0.693(1-0.693)/75] = 0.693+/-0.158 = (0.535,0.851) or (53.5%,85.1%)

7 0

3 years ago

3,425,645 rounded to the nearest hundred thousand

Ivan

Answer:

3,400,000

Step-by-step explanation:

refer to attached for reference

in our case, the digit in the hundred thousands place is the number 4.

How we round this digit depends on the digit directly to the right of it (i.e the ten-thousands place).

If the digit to the right is less than 5, then leave the digit in the hundred thousands place the same and make everything else to the right zeros.

if the digit to the right is 5 or greater, then increase the digit in the hundred thousands place by 1 and then make everything else to the right zeros.

in our case, the digit to the right of the hundred thousands place is the number 2, this is less than 5, so we leave 4 the same and make everything esle to the right zero.

i.e. 3,400,000