If a > 0 and b < 0, then which of the following must be true.ab > 0

a + b < 0

a - b > 0

a + b > 0

b - a > 0

Answers

Answer 1
Answer: We need to find the correct answer on the given choices:

If a > 0 and b < 0, then The answer is a + b > 0
let’s give a specific example:
let’s have a = 1
and b = .20

Now, let’s try calculating if our answer is correct.
Thus a + b > 0
=> a + b
=> 1 + .20
=> 1.20
and 1.20 is greater than 0.
=>Therefore 1.20 > 0 = a + b > 0





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In the figure ABC and XBY are isosceles triangles. AC=6 cm. And XY=4 cm. Find the area of the shaded region.

Answers

Area of the triangle is expressed by the product of the base and the height divided by two. This is from the idea that a parallelogram having an area of length times width can be divided yielding to two triangles. 

Area of shaded region = Area of triangle ABC - Area of triangle XBY
Area of triangle ABC = (6) (6) / 2 = 18 cm^2
Area of triangle XBY = (4) (4) / 2 = 8 cm^2
Area of shaded region = 18 - 8 = 10 cm^2

Which is a better buy, a 24 ounce box of ceral for $3.69 or 36 ounce box of ceral for $4.89

Answers

The lesser the price the better the buy.

$3.69 ÷ 24 ≈ $0.15

$4.89 ÷ 36 ≈ $0.14

36 ounce box of ceral for $4.89 is the better buy.

What does the mean absolute deviation describe about the data??? Plz help me, I need it to complete my hw... Plz!

Answers

Another way to describe the variability of a set of data is to use its mean absolute deviation. The mean absolute deviation of a set of data is the average distance between each data value and the mean.

(2 + 3x)° find the value of x

Answers

If that is a expoet is 0 its 1

Please help and write answer as decimal

Answers

52/28 = =1,85714 ...

so 1,9 if u have 5 or more in next place u round it up 
do u multiply and if so the answer is 14.56

Solve 4 1/4 - 2 11/20

Answers

4(1)/(4) - 2(11)/(20)
Change them into improper fractions by multiplying the denominator(bottom) by the whole number then adding the numerator
(17)/(4) - (51)/(20)
You must have a common denominator
Multiply (17)/(4) by (5)/(5)(85)/(20)
(85)/(20)-(51)/(20)=(34)/(20)
Simplify by dividing the numerator by the denominator
34÷20=1(14)/(20)1 (7)/(10) reduced
You answer is 1 (7)/(10)
This could be solved as a group of mixed numbers, but I like to work with improper fractions more.
17/4 - 51/20
Next, you need to find a common denominator.
85/20 -51/20
When adding and subtracting fractions, you only work in the numerator, and the denominator stays the same.
34/20
Then, you just simplify.
Improper fraction: 17/10
Mixed number: 1 7/10
Decimal: 1.7