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Biblioteka

IM: 7.5.15: Solving Equations with Rational Numbers (Practice)

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Posljednje ažuriranje over 1 year ago
16
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Pitanje 11
11.

Write an equation where a number is added to a variable, and a solution is -8.

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Pitanje 12
12.

Write an equation where a number is multiplied by a variable, and a solution is \frac{-4}{5}.

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Solve.

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Pitanje 1
1.

\frac{2}{5}t=6

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Pitanje 2
2.

-4.5=a-8

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Pitanje 3
3.

\frac{1}{2}+p=-3

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Pitanje 4
4.

12=x\cdot3

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Pitanje 5
5.

-12=-3y

Pitanje 6
6.

Match each equation to a step that will help solve the equation.

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

\frac{x}{5}=8

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Multiply each side by \frac{1}{5}.

3=\frac{-x}{5}

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Multiple each side by 5.

7=-5x

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Multiply each side by -5.

5x=0.4

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Multiply each side by \frac{-1}{5}.

Evaluate each expression if x is \frac{2}{5}, y is -4, and z is -0.2.

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Pitanje 7
7.

x+y

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Pitanje 8
8.

2x-z

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Pitanje 9
9.

x+y+z

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Pitanje 10
10.

y\cdot x

Pitanje 13
13.

The markings on the number line are evenly spaced. Label the other markings on the number line.

In 2012, James Cameron descended to the bottom of Challenger Deep in the Marianas Trench; the deepest point in the ocean. The vessel he rode in was called DeepSea Challenger.

Challenger Deep is 35,814 feet deep at its lowest point

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Pitanje 14
14.

DeepSea Challenger’s descent was a change in depth of (-4) feet per second. We can use the equation y=-4x to model this relationship, where y is the depth and x is the time in seconds that have passed. How many seconds does this model suggest it would take for DeepSea Challenger to reach the bottom?

1
Pitanje 15
15.

To end the mission DeepSea Challenger made a one-hour ascent to the surface. How many seconds is this?

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Pitanje 16
16.

The ascent can be modeled by a different proportional relationship y=kx. What is the value of k in this case?