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4 years ago

A ²-3ac+c ² if a=-2/3 and c=1/5

Mathematics

1 answer:

mixer [17]4 years ago

5 0

Answer:

199/225

Step-by-step explanation:

$(\frac{-2}{3})^2-3(\frac{-2}{3}(\frac{1}{5} )+(\frac{1}{5})^2$

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Use the equation 135•42=5,670 and what you know about fractions, decimals, and place value to explain how to place the decimal p

frozen [14]

Answer:

5.67

Step-by-step explanation:

Let's examine both factors...

1.35 comes from 135, it's 100 times smaller, so this factor would force me to move the decimal point by 2 positions to the left.

4.2 comes from 42, it's 10 times smaller, so this factor would force me to move the decimal point by 1 position to the left.

In total, the decimal point would have to be moved by 3 positions, to the left... so 5,670 would become 5.67

Which is easily verifiable just by looking at the end equation, even without calculating it:

1.35 * 4.2 would give something around 5... not around 50 nor 500.

3 0

3 years ago

Read 2 more answers

Problem 1: Given the following probabilities P(Ac) = 0.45, P(B) = 0.34, and P(B|A) = 0.23. Find the following probabilities:

-BARSIC- [3]

Answer:

P(A)=0.55

P(A and B)=P(A∩B)=0.1265

P(A or B)=P(A∪B)=0.7635

P(A|B)=0.3721

Step-by-step explanation:

P(A')=0.45

P(A)=1-0.45=0.55

P(B∩A)=?

P(B|A)=0.23

P(B|A)=(P(A∩B))/P(A)

0.23=(P(A∩B))/0.55

P(A∩B)=0.23×0.55=0.1265

P(A∪B)=P(A)+P(B)-P(A∩B)

=0.55+0.34-0.1265

=0.7635

P(A|B)=[P(A∩B)]/P(B)=0.1265/0.34 ≈0.3721

8 0

3 years ago

Two brothers each purchase a new pair of hiking boots and two canteens. The hiking boots cost 34.00 each. The total of their pur

polet [3.4K]

Answer:

The cost of one canteen is $7.5

Step-by-step explanation:

We are given the following in the question:

Each brother purchase a new par of boots and two canteens.

Cost of one hiking boots = $34.00

Total cost of hiking boots =

$=34\times 2\\=\$68.00$

Let x dollars be the cost of one canteen.

Number of canteens bought by both brother = 4

Total bill = $98.00

Thus, we can write the equation:

$68 + 4x = 98$

Solving the equation, we get,

$68 + 4x = 98\\4x = 98-68\\4x = 30\\x = 7.5$

Thus, the cost of one canteen is $7.5

4 0

3 years ago

What does the a equal in a/20=10

r-ruslan [8.4K]

Step-by-step explanation:

a/20=10

=a=10×20

a=200

4 0

3 years ago

Is 0 a solution to 2x+10 = 4x+10 explain or show your reasoning

otez555 [7]

0 is considered a solution because when you multiply both 4 and 2 by 0, you always get 0. when you add 10 to 0 you get zero, meaning that you get the same answer for both sides.

3 0

3 years ago