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3 years ago

PLEASE HELP! which expression is equivalent to 4(3+5) - 3.9%? C 1220-54

Mathematics

1 answer:

kiruha [24]3 years ago

5 0

Answer: 30.752

Step-by-step explanation:

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Xavier (x) has $20 more than Sara (s). Their combined money totals $90. Which system of equations represents this situation?

borishaifa [10]

Answer:

B) x + s = 90, x - s = 20

Step-by-step explanation:

x + s = 90 represents that both Xavier and Sara's money combined is $90.

x - s = 20 represents that Xavier has 20 more dollars than Sara.

8 0

3 years ago

Divide 20 chocolates between Adi and Suresh such that adi gets 60% while Suresh gets 40% of the chocolates

Eddi Din [679]

Hello!

To find how much chocolate Adi and Suresh receives, you need to convert the percentage to a decimal, then you multiply that decimal by the total number of chocolates, which is 20.

To convert percentages to decimals, divide the percentage by 100, and remove the percentage.

60% / 100 = 0.60

20% / 100 = 0.20

Then, we multiply 0.60 and 0.20 by 20.

0.60 x 20 = 12

0.40 x 20 = 8

Therefore, Adi gets 12 chocolates and Suresh gets 8 chocolates.

6 0

3 years ago

Which of the following is equivalent to x^-1/2 1) -1/2x 2) -√x 3) 1/√x 4) -1/2x

irina [24]

Answer:

Option (3) is correct.

Step-by-step explanation:

We need to find the expression that is equivalent to $x^{-1/2}$ .

The property is : $x^{-a}=\dfrac{1}{x^a}$

Here, a = 1/2

So,

$x^{-1/2}=\dfrac{1}{x^{1/2}}$

We know that, $x^{1/2}=\sqrt{x}$

$\dfrac{1}{x^{1/2}}=\dfrac{1}{\sqrt{x} }$

So, $x^{-1/2}$ is equivalent to $\dfrac{1}{\sqrt{x} }$

Hence, the correct option is (3).

3 0

3 years ago

Passes through (2,-3) and has a slope of 3

Helga [31]

Answer:

y = 3x - 8

Step-by-step explanation:

8 0

3 years ago

9x - 7x2 +4x2 - x + 4x3 - 3x2

Anna35 [415]

Answer:

The answer to your question is: 4x³ - 6x² + 8x

Step-by-step explanation:

see the picture

3 0

4 years ago