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3 years ago

Find the x-intercepts of f(x) = x2 + 7x + 10.

Mathematics

1 answer:

Andrej [43]3 years ago

6 0

Answer:

x = - 5, x = - 2

Step-by-step explanation:

Given

f(x) = x² + 7x + 10

To find the x- intercepts let f(x) = 0, that is

x² + 7x + 10 = 0 ← in standard form

(x + 2)(x + 5) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

x + 5 = 0 ⇒ x = - 5

The x- intercepts are (- 5, 0) and (- 2, 0 )

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Bas_tet [7]

Answer:

Speed of the river = $\frac{4}{3}$ km per hour

Step-by-step explanation:

Speed of the boat in still water = 4 km per hour

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Speed of the boat upstream = (4 - v) km per hour

Time taken to cover 6 km = $\frac{\text{Distance}}{\text{Speed}}$

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Speed of the boat downstream = (4 + v) km per hour

Time taken to cover 12 km = $\frac{12}{4+v}$ hours

Since, time taken by the boat in both the cases is same,

$\frac{6}{4-v}= \frac{12}{4+v}$

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18v = 24

v = $\frac{24}{18}$

v = $\frac{4}{3}$ km per hour

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2 years ago

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Elan Coil [88]

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2 years ago

A table is 105 cm high. Its height is 1.2 times its length. What is the length of the table?

Alisiya [41]

Answer:

<h2>The Answer is 126.</h2>

Step-by-step explanation:

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2 years ago

Tim Has M Dollars. Rebecca has $6 less than 1/10 Times The Number Of Dollars That Tim Has. Which Expression represents the total

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M = Tim's dollar amount
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MR = 70 + (7 - 6)

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Read 2 more answers

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