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Charra [1.4K]
3 years ago
14

Rosa has $175 in her online music account. Each month she buys $15 worth of new songs. Which inequality could be solved

Mathematics
1 answer:
Virty [35]3 years ago
6 0

Answer:

it is C)15x - 175 < 10

Step-by-step explanation:

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4 more than twice a number
Nataliya [291]
Twice means two times something so2a. Four more than means adding for so your answer is 2a+4
7 0
3 years ago
A rental car company claims the mean time to rent a car on their website is 60 seconds with a standard deviation of 22 seconds.
Gelneren [198K]

Answer:

Since the calculated value of Z does not fall in the critical region we accept our null hypothesis that mean = 60 seconds

Step-by-step explanation:

State the null hypothesis

H0: u = 60against the claim

Ha u≠   60   (this is a two tailed test)

Sample size n= 36

Sample mean=X`= 55

Population mean = u= 60

The significance level α = 0.05

Standard deviation= Sd = 22 seconds

Z= X`- u / Sd /√n

Z= 55- 60 / 22/√6

z= - 5/22/6

Z= -1.3635

The value of z from the table is Z∝/2= ±1.96

The critical region is less than - 1.96 and greater than 1.96.

Since the calculated value of Z does not fall in the critical region we accept our null hypothesis that mean = 60 seconds

4 0
3 years ago
B) What is litmus? How is it prepared?
Citrus2011 [14]

Answer:

purple dye

Step-by-step explanation:

extracted from a plant ,"Lichen", cellulose.

5 0
3 years ago
A football player punts a ball. The path of the ball can be modeled by the equation y = –0.004x2 + x + 2.5, where x is the horiz
Galina-37 [17]
The answer is <span>252.5 ft

</span><span>y = –0.004x</span>²<span> + x + 2.5
Let's take y = 0 and we'll get the quadratic equation:

</span>–0.004x² + x + 2.5 = 0
The general formula for quadratic equation is:
ax² + bx + c = 0

a = -0.004
b = 1
c = 2.5

x_{1,2} = \frac{-b+/- \sqrt{ b^{2}-4ac} }{2a} =\frac{-1+/- \sqrt{ 1^{2}-4*(-0.004)*2.5} }{2*(-0.004)} = \frac{-1+/- \sqrt{1+0.04} }{-0.008} = \\ &#10;=\frac{-1+/- \sqrt{1.04} }{-0.008} = \frac{-1+/-1.02}{-0.008}

x_1=\frac{-1+1.02}{-0.008} = \frac{0.02}{-0.008} = -2.5 \\ &#10;x_2=\frac{-1-1.02}{-0.008} = \frac{2.02}{-0.008} = 252.5

Since distance cannot be negative (x1), the correct answer is x2 = 252.5 ft
5 0
3 years ago
Read 2 more answers
what is the equation in point slope form of a line that passes through the point (–8,2) and has a slope of 1/2?
madam [21]
Y=1/2x+6

Y-2=1/2(x+8)
Then simplify and get y by itself
5 0
3 years ago
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