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Kaylis [27]
2 years ago
15

Solve the simultaneous equations by substitution x − y = 8, x + 4y = 13

Mathematics
1 answer:
Evgesh-ka [11]2 years ago
4 0

Answer:

x = 9; y = 1

Step-by-step explanation:

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The top of a mountain is 2,450 feet above sea level a shipwreck was discover 310 feet below sea level what is the distance betwe
arlik [135]

Answer:

d=2,760\ ft

Step-by-step explanation:

Let

x ----> the height of the top of a mountain above sea level

y ----> the deep of a shipwreck below the sea level

we know that

The sea level represent the height equal to zero

In this problem we have

x=2,450\ ft ---> is positive because is above sea level

y=-310\ ft ---> is negative because is below sea level

To find out the distance between the mountain top and the ship wreck, determine the absolute value of the difference between the two values

d=\left|x-y\right|

substitute the values

d=\left|2,450-(-310)\right|

d=\left|2,450+310\right|

d=\left|2,760\right|

d=2,760\ ft

5 0
3 years ago
9. A park manager claims the profit P for a concession stand depends on the number of visitors V, and that
Rudiy27

Answer:

its a

Step-by-step explanation:

5 0
3 years ago
Heyyy can someone help me please! xx
sveticcg [70]

Answer:

option 2

Step-by-step explanation:

they have the same shape AND angle meaning they are more so similar than other options

3 0
3 years ago
Read 2 more answers
Y is a differentiable function of x. Choose the alternative that is the derivative dy / dx.
murzikaleks [220]

Differentiating both sides of

x^3-y^3=1

with respect to <em>x</em> yields (using the chain rule)

3x^2 - 3y^2 \dfrac{\mathrm dy}{\mathrm dx} = 0

Solve for d<em>y</em>/d<em>x</em> :

3x^2 - 3y^2 \dfrac{\mathrm dy}{\mathrm dx} = 0 \\\\ 3y^2\dfrac{\mathrm dy}{\mathrm dx} = 3x^2 \\\\ \dfrac{\mathrm dy}{\mathrm dx} = \dfrac{3x^2}{3y^2} = \dfrac{x^2}{y^2}

The answer is then D.

3 0
3 years ago
How do you increase 300 by 54%?
Vanyuwa [196]
Multiply 300 by 54%= 16,200
Divide 16,200 by 100
= 162.20
Round 162.20 to the nearest whole
= 162
hope this helps.
This is the steps to finding a percent
4 0
3 years ago
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