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3 years ago

I honestly have no clue how to do these

Mathematics

1 answer:

densk [106]3 years ago

4 0

Answer:

$-2^{2} -4(1)(5)$

so the answer would be c.

Step-by-step explanation:

The discriminant is the following equation:

$b^{2} -4ac$

You just simply plug in the values of the coefficients.

$0=x^{2} -2x+5$

a = 1 (first terms coefficient)

b = -2 (second terms coefficient)

c = 5 (last terms coefficient)

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NEED ANSWERS NOW!!!

Anni [7]

Y=x would be the lesser relationship i believe. when Y=x is graphed the slope has a lesser rise over run output. AKA, the slope is less steep and takes longer to reach higher on the graph as to compared relationship A

8 0

3 years ago

Sesame Company purchased a computer system for $74,000 on January 1, 2018. It was depreciated based on a 7-year life and an $18,

amm1812

Answer: $24000

Step-by-step explanation:

Depreciation for 2018 = ($74,000 - $18000) / 7

= $56000/7

= $8000

Depreciation for 2019 = ($74,000 - $18000) / 7

= $56000/7

= $8000

Depreciation up to 2019 = $8000 + $8000 = $16000

Book value at end of 2019 = $74000 - $16000 = $58000

Revised residual value = $10,000

Number of remaining years = 4-2 = 2 years

Depreciation expensed for 2020 will be:

= ($58000 - $10,000) / 2

= $48000/2

= $24000

7 0

2 years ago

Factor -7x3 + 21x2 + 3x - 9 by grouping. What is the resulting expression?

irga5000 [103]

Answer:

$(x-3)(-7x^2+3)$ is the resulting expression after grouping

Step-by-step explanation:

Given:

$-7x^3+21x^2+3x-9$

Now taking common $-7x^2$ from 1st 2 numbers and and 3 common from last we get

$-7x^2(x-3)+3(x-3)$

Now taking x-3 common from both numbers we get

$(x-3)(-7x^2+3)$ which is the final equation after grouping

8 0

3 years ago

My brain just kind of exploded when reading this, please help!

zhannawk [14.2K]

Answer:

4.8 liters

Step-by-step explanation:

o=orange juice c=cranberry juice

Punch = 4/5o + 1/6c it means that any quantity of punch will have the same proportion of the two ingredients

now, you know that 1 liter can be written as 6/6 liters, so to get those 6/6 you multiply 1/6 by 6

for the proportion to remain valid, you must multiply by 6 also the other ingredient so (4/5)*6 = 24/5 of a liter of orange juice per liter of cranberry juice and 24/5 = 4.8 liters

4 0

3 years ago

Express the confidence interval (0.432, 0.52 in the form of ±<br> e.

lakkis [162]

For a known standard deviation, the confidence interval for sample size = n is
$(x-z \frac{ \sigma }{ \sqrt{n}},x+x \frac{ \sigma }{ \sqrt{n} } )$
where
x = average
n = sample size
$\sigma$ = stad. deviation
z = contant that reflects confidence interval

Let a = x
Let b = $z \frac{ \sigma }{ \sqrt{n} }$

From the given information,
a - b = 0.432 (1)
a + b = 0.52 (2)

Add (1) and (2): 2a = 0.952 => a = 0.476
Subtract (2) from (1): -2b = -0.088 => b = 0.044

Therefore, the confidence interval may be written as
(0.476 - 0.044, 0.476 + 0.044), or as
(0.476 $\pm$ 0.044)

4 0

3 years ago