15 days ago

Ishi walked a total of 2 1/2 miles on the treadmill a constant rate of 4 miles per hour. Which expression shows how long in minu

tes ishi walked on the treadmill. Answer choices: 2.5 miles × 4miles/hour × 60minutes/1 hour. 2.5 miles ÷4miles/hour÷60minutes/1hour. 2.5 miles × 4miles/hour ÷60minutes/1hour. 2.5 miles ÷ 4miles/hour × 60minutes/1 hour

Mathematics

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Which are the solutions of x2 = –11x + 4? StartFraction negative 11 minus StartRoot 137 EndRoot Over 2 EndFraction comma StartFr

Inessa [12570]

Answer:

$x_1=-\frac{11}{2}-\frac{\sqrt{137} }{2}\\\\x_2=-\frac{11}{2}+\frac{\sqrt{137} }{2}$

Step-by-step explanation:

Given the quadratic equation:

$x^2 = -11x + 4$

To solve it, we follow these steps:

1. Rearrange the terms to one side of the equation:

$x^2+11x- 4=0$

2. Utilize the Quadratic formula $x=\frac{-b\±\sqrt{b^2-4ac} }{2a}$ .

In this case, we can identify that:

$a=1\\b=11\\c=-4$

Then, substituting these values into the Quadratic formula gives us the following solutions:

$x=\frac{-11\±\sqrt{11^2-4(1)(-4)} }{2(1)}$

$x_1=-\frac{11}{2}-\frac{\sqrt{137} }{2}\\\\x_2=-\frac{11}{2}+\frac{\sqrt{137} }{2}$

3 0

1 month ago

Read 2 more answers

In a study on the fertility of married women conducted by Martin O’Connell and Carolyn C. Rogers for the Census Bureau in 1979,

babunello [11817]

We cannot infer that the proportion of wives married less than two years intending to have children is significantly greater than that of those married for five years.

4 0

1 month ago

Two towns accumulated different amounts of snow. In town 1, the snow depth is increasing by 3 1/2 inches every hour. In town 2 t

tester [12383]

a=2+6t, b=10+2t

a=b when

2+6t=10+2t subtract 2t from both sides

2+4t=10 subtract 2 from both sides

4t=8 divide both sides by 4

t=2

Thus, they will have the same amount of snowfall after two hours

hope i helped

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2 months ago