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natulia [17]
4 years ago
6

How to factorise 4a2 - 12b

Mathematics
1 answer:
nlexa [21]4 years ago
5 0
4a² - 12b
4(a²) - 4(3b)
4(a² - 3b)
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In DCAB, If DB=38, What is DC? 38 45 52 112
dedylja [7]

Answer:

C. 52°

Step-by-step explanation:

In ∆CAB, m<A = right angle = 90°

m<B = 38°

m<C + m<A + m<B = 180° (sum of ∆)

m<C + 90° + 38° = 180° (substitution)

m<C + 128 = 180

m<C = 180 - 128 (subtraction property of equality)

m<C = 52°

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3 years ago
Find the mean for the set of data.<br> 0.2, 0.21, 0.17, 3.22, 0.2
Sholpan [36]

Answer:

0.8

Step-by-step explanation:

Find the mean of the list:

(0.2, 0.21, 0.17, 3.22, 0.2)

The mean of a list of numbers is given by:

(sum of elements)/(number of elements)

(sum of elements) = 0.2 + 0.21 + 0.17 + 3.22 + 0.2:

(0.2 + 0.21 + 0.17 + 3.22 + 0.2)/(number of elements)

Counting, we see that the list has 5 elements:

(0.2 + 0.21 + 0.17 + 3.22 + 0.2)/5

0.2 + 0.21 + 0.17 + 3.22 + 0.2 = 4:

4/5

4/5 = 0.8:

Answer:  0.8

7 0
2 years ago
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The answer is gonna be -3/14
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If x = 15 and y = 4, what is the value of the following expression?
Mandarinka [93]
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Jackie used 4 apples and 16
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Step-by-step explanation:

8 0
3 years ago
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