Find the x-coordinates of the points where the graph crosses the x-axis:

Mathematics

1 answer:

ruslelena [56]2 years ago

3 0

Answer:

29. (5,0) and (-7/2,0)

30. (-1,0) and (5/7,0)

Step-by-step explanation:

29. y=2x² - 3x - 35

y = (x-5)(2x+7)

y is 0 at x = 5 and -(7/2)

31: y=-7x² - 2x + 5

y = -(x+1)(7x-5)

y is 0 at -1 and 5/7

See the attached graph.

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The thickness of a one-dollar bill is 1.1 × 10-4 meters. Each measurement below is the thickness of a stack of one-dollar bills.

steposvetlana [31]

Answer:

1. $1.1 \times10^{-3}$ meters

2. $1.375 \times10^{-1}$ meters

3. $1.507 \times10^{-2}$ meters

Step-by-step explanation:

1. The thickness of a one-dollar bill is $1.1 \times10^{-4}$ meters.

Now, if the thickness of a stack of one-dollar bill is $1.1 \times10^{-3}$ meters, then there will be $\frac{1.1 \times10^{-3}}{1.1 \times10^{-4}}$ = 10 Dollars bill.

Therefore, the amount will be $10.

2. The thickness of a one-dollar bill is $1.1 \times10^{-4}$ meters.

Now, if the thickness of a stack of one-dollar bill is $1.375 \times10^{-1}$ meters, then there will be $\frac{1.375 \times10^{-1}}{1.1 \times10^{-4}}$ = $1.25 \times 10^{3}$ Dollars bill.

Therefore, the amount will be $ $1.25 \times 10^{3}$ .

3. The thickness of a one-dollar bill is $1.1 \times10^{-4}$ meters.

Now, if the thickness of a stack of one-dollar bill is $1.507 \times10^{-2}$ meters, then there will be $\frac{1.507 \times10^{-2}}{1.1 \times10^{-4}}$ = 137 Dollars bill.