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Pani-rosa [81]
3 years ago
15

Khalid is 8 years older than his sister Noora. After two years, Khalid’s age will be double Noora’s age. How old is each one of

them now?
Mathematics
2 answers:
s2008m [1.1K]3 years ago
8 0

Answer:

<h2>Khalid will be 16 and Noora will be 8</h2>

Step-by-step explanation:

<h2 />
marta [7]3 years ago
3 0
Khalid is 16 and Noora is 8
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Step-by-step explanation:

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3 years ago
An object is launched at 29.4 meters per
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Answer:

The reasonable domain for the scenario is option 'a';

a) [0, 7]  

Step-by-step explanation:

For the projectile motion of the object, we are given;

The speed at which the object is launched, v = 29.4 meters per second

The height of the platform from which the object is launched, h = 34.3 meter

The equation for the height of the object as a function of time 'x' is given as follows;

f(x) = -4.9·x² + 29.4·x + 34.3

The domain for the scenario, is given by the possible values of 'x' for the function, which is found as follows;

At the height from which the object is launched, x = 0, and f(x) = 34.3

At the ground level to which the object can drop, f(x) = 0

∴ f(x) = -4.9·x² + 29.4·x + 34.3 = 0

-4.9·x² + 29.4·x + 34.3 = 0

By the quadratic formula, we have;

x = (-29.4 ± √(29.4² - 4 × (-4.9) × 34.3))/(2 × (-4.9)

∴ x = -1, or 7

Given that time is a natural number, we have the reasonable domain for the scenario as the start time when the object is launched, t = 0 to the time the object reaches the ground, t = 7

Therefore, the reasonable domain for the scenario is; 0 ≤ x ≤ 7 or [0, 7].

4 0
2 years ago
The snack bar at your school has added sushi to its menu. The ingredients for one roll include sushi​ rice, seaweed​ sheets, cuc
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Answer:

The answer si:  

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- 24 servings - 9 oz of salmon

- 80 servings - 30 oz of salmon

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1 roll is 8 servings and it is also made of 3oz of smoked salmon. That means that 3oz of smoked salmon is needed fo 8 servings.

Now, let's made some proportions:

16 servings:

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x = 3 · 16 ÷ 8 = 6 oz

24 servings:

3 oz is for 8 servings, how much oz is for 24 servings:

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80 servings:

3 oz is for 8 servings, how much oz is for 80 servings:

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x = 3 · 80 ÷ 8 = 30 oz

100 servings:

3 oz is for 8 servings, how much oz is for 100 servings:

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