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elena55 [62]
3 years ago
9

-2s-4s+10s Simplify the expression

Mathematics
1 answer:
Agata [3.3K]3 years ago
5 0

Answer:

4s

Step-by-step explanation:

You can just pretend it's like normal addition and subtraction but with s, so you do -2s - 4s + 10s = -6s + 10s = 4s.

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Erika’s toy ski chalet is valued at €450. Its value increases by 10% then decreases by 10% the year after. What is the value of
Musya8 [376]

Answer:

€445.5

Step-by-step explanation:

First we calculate the increase percentage and the increase.

Increase = 450 + (10%*450)

Now we must calculate the percentage of the increase.

Increase percentage = 10% of €450 = 450*0.1 = 45

Increase = 450 + 45 = €495

Since the decrease happens to the <em>new </em>number, the decrease and the decrease percentage <em>both </em>must be to the new changed number, which is 495

Decrease = 495 - (10%*495)

Again we must calculate the percentage of the decrease.

Decrease percentage = 10%*495 = 0.1*495 = 49.5

Decrease = 495 - 49.5 = 445.5

So, the value of Erika's ski chalet after the two changes = €445.5

7 0
3 years ago
Jabary is thinking of 3 numbers the greatest number is twice as large as the least number the middle number is 3 more than the l
antiseptic1488 [7]
A + b +c = 75; where a is the greatest number; b is the middle number; c is the least number;

a = 2 * c;

b = 3 + c;

then, 2 * c + 3 + c + c = 75 => 4 * c = 72 => c = 72 / 4 => c = 18 => a = 2 * 18 => a = 36; b = 3 + 18 => b = 21;


3 0
3 years ago
What is the discriminant of the quadratic equation: (multiple choice)
Dominik [7]

Answer:

85

Step-by-step explanation:

<em>The equation for the discriminant is </em>

b^2-4(a)(c)

<em>Plug your numbers in from the equation. </em>

<em>1=a, -7=b, -9=c</em>

<em />

(-7)^2-4(1)(-9)

49-(-36)

49+36

85

6 0
4 years ago
What is the opposite of 3 over 4
Hoochie [10]

Answer:

Step-by-step explanation:

Explanation: There is nothing known as opposite in algebra. If you mean additive inverse it is 34 and if you mean multiplicative inverse or reciprocal it is −43 . multiplicative inverse, also called reciprocal, is the number which when multiplied with the number results in 1 , the multiplicative identity element.

6 0
3 years ago
Read 2 more answers
1. A basketball is slightly larger than a bowling ball. Which ball has a greater mass?
Dvinal [7]

Answer:

Bowling Ball because a bowling ball has mass in the middle. Basketballs are empty inside but Bowling Balls are more dense

Step-by-step explanation:

8 0
3 years ago
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