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Arisa [49]
3 years ago
15

the equation d=2.5t+4 gives the depth of the snow on the ground during a snowstorm. The variable t stands for the time that has

passed since the start of the storm, and d stands for the total depth of the snow in inches. Which statement is true?

Mathematics
2 answers:
yulyashka [42]3 years ago
3 0

Answer:

There was already 4 inches of snow fall before the storm brainiest?

Step-by-step explanation:

Lina20 [59]3 years ago
3 0
The first answer choice, which is the one on the top.
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show that thw roots of the equation (x-a)(x_b)=k^2 are always real if a,b and k are real. Please I really need help with this
VLD [36.1K]

Answer:

see explanation

Step-by-step explanation:

Check the value of the discriminant

Δ = b² - 4ac

• If b² - 4ac > 0 then roots are real

• If b² - 4ac = 0 roots are real and equal

• If b² - 4ac < 0 then roots are not real

given (x - a)(x - b) = k² ( expand factors )

x² - bx - ax - k² = 0 ( in standard form )

x² + x(- a - b) - k² = 0

with a = 1, b = (- a - b), c = -k²

b² - 4ac = (- a - b)² + 4k²

For a, b, k ∈ R then (- a - b)² ≥ 0 and 4k² ≥ 0

Hence roots of the equation are always real for a, b, k ∈ R


           

8 0
3 years ago
There are 5 less oranges on the tree today than there was yesterday<br><br> Plz help
topjm [15]
That’s all ? is there like no other explanation to make it understood better ?
8 0
3 years ago
Read 2 more answers
The graph shows which inequality? The equation of the boundary line is y = –x + 4. y –x + 4 y ≥ –x + 4
DaniilM [7]

Answer:

y≤-x+4

Step-by-step explanation:

x intercept =4

y intercept=4

the shaded area under the solid line because it is greater than or equal

8 0
4 years ago
Lisa's test grades are 79, 89, and 90. there will be one more test this year. if lisa wants her test average to be at least 88,
erik [133]
For this case, what we are going to do first is to assume that all the exams are worth the same percentage of the final grade.
 We have then that Lisa's average grade point equation is:
 88 =  \frac{79 + 89 + 90 + x}{4}
 Where,
 x: minimum note that lisa must obtain in the last exam.
 Clearing x we have:
 x = (88 * 4) - (79 + 89 + 90)&#10;&#10;x = 94
 Answer:
 
the lowest grade she can get on her last test is:
 
x = 94
5 0
4 years ago
what is the equation, in slope-intercept from, of the line that is perpendicular to the line y - 4 = -2/3 (x -6 ) and passes thr
Ne4ueva [31]

Turn y - 4 = -2/3(x - 6) into a linear equation.

y - 4 = -2/3(x - 6)

y - 4 = -2/3x + 4

 +4                +4

y = -2/3x + 8

The equation that is perpendicular to y = -2/3x + 8 is y = 3x + 4 as shown in the image below using a graph.


5 0
3 years ago
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