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tatyana61 [14]
2 years ago
9

The equation $x + {y = 2 can be rewritten in a form that reveals the y-intercept of the graph of the equatior

Mathematics
1 answer:
SSSSS [86.1K]2 years ago
7 0

Answer:

y = \frac{2}{z} - \frac{x}{z}

Step-by-step explanation:

Given

x + zy = 2

Required

Rewrite to show y-intercept

We have: x + zy = 2

Subtract x from both sides

zy = 2-x

Divide both sides by z

y = \frac{2}{z} - \frac{x}{z}

<em>The y intercet is: </em>\frac{2}{z}<em></em>

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With that in mind, cross multiply, which would give you: 10(7x-1) = 22(3x+1).
Turns into: 70x -10 = 66x+22. Then just solve for x
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pshichka [43]

Answer:

B. -1/3

Step-by-step explanation:

replace <em>x</em> with 34 and solve it.

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17) 10(x + 3) -(-9x - 4) = x-5 +3
navik [9.2K]

Answer:

-2

Step-by-step explanation:

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3 years ago
Tonya and Leo each bought a cell phone at the same time. The trade-in values, in dollars, of the cell phones are modeled by the
Paha777 [63]

Answer:

The answer is Tonya's phone had the greater initial trade-in value.

Leo's phone decreases at an average rate slower than the trade in value of Tonya's phone.

Step-by-step explanation:

Given

Tonya

f(x) = 490 * 0.88^x

Leo

x \to g(x)

0 \to 480

2 \to 360

4 \to 470

Solving (a): The phone with greater initial value

The initial value is when x = 0. So, we have:

f(x) = 490 * 0.88^x

f(0) = 490 * 0.88^0

f(0) = 490 * 1

f(0) = 490

From Leo's table

g(0) = 480

By comparison;

f(0) > g(0)

i.e.

490 > 480

<em>So: Tonya's had the greater initial trade-in value</em>

Solving (b): The phone with lesser rate

An exponential function is:

y = ab^x

Where:

b \to rate

For Tonya

b = 0.88

For Leo, we have:

(x_1,y_1) = (0,480)

(x_2,y_2) = (2,360)

So, the equation becomes:

y = ab^x

480 = ab^0 and 360 = ab^2

Solving 480 = ab^0, we have:

480 = a * 1

480 = a

a= 480

360 = ab^2 becomes

360 = 480 * b^2

Divide both sides by 480

0.75 = b^2

Take square roots

0.87 = b

b=0.87 -- Leo's rate

By comparison; Leo's rate is slower i.e. 0.87 < 0.88

6 0
2 years ago
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Brilliant_brown [7]

just look at it and think hard. you got this you don't need to use brainly

6 0
3 years ago
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