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2 years ago

The roots of the equation 2x^2+8x-7=-2 are?

1 answer:

6 0

2x^2+8x-7=-2
2x^2+8x - 5 = 0

using the formula:- x = [-8 +/- sqrt(8^2 - 4*2*-5) ] / 4
= -2 +/- sqrt 104)/2
= 0.5495 , -4.549

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At the end of each week, an employer gives some vacation hours to a few randomly selected employees. There are 25 employees in h

densk [106]

Answer: There are 177100 possible groups.

Step-by-step explanation:

Given: Total employees = 25

Number of employees wants to choose = 6

The combination of n things taken r at a time is given by:-

$^nC_r=\frac{n!}{r!(n-r)!}$

Put n = 25 and r= 6, we get

$^{25}C_6=\frac{25!}{6!(25-6)!}\\\\=\frac{25\times24\times23\times22\times21\times20\times19!}{6!19!}\\\\=177100$

Hence, there are 177100 possible groups.

8 0

2 years ago

heeeelllllpppppp heyyy i need help asap and please try your best and solve the problem out it would be greatly appreciated becau

andreev551 [17]

Answer:

${10}^{ - 14}$

Step-by-step explanation:

$\huge\frac{ {10}^{ - 9} }{ {10}^{5} } \\ \\ \huge = {10}^{ - 9} \times {10}^{ - 5} \\ \\ \huge = {10}^{ - 9 + ( - 5)} \\ \\ \huge = {10}^{ - 9 - 5} \\ \\ \huge \orange {= {10}^{ - 14}}$

7 0

3 years ago

Read 2 more answers

Use factoring to solve the quadratic equation. 2x^2=5X+3

prohojiy [21]

Move everything to one side
Equation
2x^2 - 5x -3 = 0
Sq rt means square root or radical sign
Quadratic equation-> x = - (b) +/- Sq rt b^2 -4ac
2a
- (-5) +/- Sq rt (-5)^2 - 4(2)(-3)
2 (2)
5 +/- Sq rt 25 + 24
4
Sq rt 29 = 5.38
5 + Sq rt 29 divides over 4 and 5 - Sq rt 29 divides over 4.

4 0

2 years ago

For her job gloria makes 12.00 an hour but spends .50 each day traveling to and from.work if her net income from yesterday was 7

Elza [17]

Gloria would have worked six hours which would put her at $72.00 but spends $0.50 to travel to and from work and that would put her at $71.50

4 0

2 years ago

Read 2 more answers

Solving Exponential and Logarithmic Equations In Exercise, solve for x. 100(1.21)x = 110

SVETLANKA909090 [29]

Answer:X=110/121

Step-by-step explanation:

Multiply 100 by 1.21 then by x

121x=110

Divide both side by 121

X=110/121

X=0.91

8 0

2 years ago