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3 years ago

6b^2+8b-10=0 please show how to do work

Mathematics

2 answers:

Len [333]3 years ago

5 0

Determine # of solutions using discrimination
D = b^2 - 4 ac
D=8^2 - 4 x 6 x ( -10 )
D = 304
D > 0
The quadratic equation has 2 real solutions

balu736 [363]3 years ago

4 0

<em>Greetings from Brasil....</em>

Let's solve this 2nd degree equation.

6b² + 8b - 10 = 0 dividing all terms by 2

3b² + 4b - 5 = 0 applying the baskara formula

Δ = 4² - 4 · 3 · (- 5)

Δ = 76

b = (- 4 ± √76)/6 so

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Please help and tell me how to do this <br> 20 POINTS

svp [43]

The answers are :
13) 9
14) 200
15) -10
16) -300

17) -276
18) -66

3 0

2 years ago

Read 2 more answers

Make V the subject of the formula E=mv2/2

Dima020 [189]

Answer:

v = ± $\sqrt{\frac{2E}{m} }$

Step-by-step explanation:

Given

E = $\frac{mv^2}{2}$ ( multiply both sides by 2 to clear the fraction )

2E = mv² ( divide both sides by m )

$\frac{2E}{m}$ = v² ( take the square root of both sides )

v = ± $\sqrt{\frac{2E}{m} }$

5 0

3 years ago

HELP GIVING FREE POINTS PLUS BRAINLIEST FOR CORRECT ANSWERS!!!

Yuki888 [10]

Rule: lines that are parallel have equal gradients.

Therefore y=-4/3x + b.

To find b, you must sub the point (6,2) into the equation y=-4/3x + b.

2= -4/3 x 6 + b
b=-10 (using algebra to solve)

Therefore y=-4/3x - 10.

4 0

2 years ago

What does 15x+35 equal

____ [38]

<span>15x+35 = 5(3x + 7)

hope that helps</span>

7 0

2 years ago

The mean daily rainfall for a week was 5.5mm.for the first six days the mean rainfall was 1mm.How much rainfall on the seventh d

spayn [35]

Answer:

There was 32.5mm of rainfall on the seventh day.

Step-by-step explanation:

Mean of a data-set:

The mean of a data-set is the sum of all values of a data-set divided by the number of values in the data-set.

The mean daily rainfall for a week was 5.5mm.for the first six days the mean rainfall was 1mm.

This means that during the week(7 days), the total amount of rain was of:

$6*1 + x = 6 + x$

How much rainfall on the seventh day ?

This is x. We have that:

$\frac{6 + x}{7} = 5.5$

$6 + x = 7*5.5$

$6 + x = 38.5$

$x = 38.5 - 6 = 32.5$

There was 32.5mm of rainfall on the seventh day.

7 0

3 years ago