All categories

3 years ago

Please Helppppp!!!!!!!

Mathematics

1 answer:

Monica [59]3 years ago

5 0

Answer:

116

real

irrational

Step-by-step explanation:

discriminant= b^2-4ac

a=1 b=8 c=-13

discriminant = 8^2 -4*(-13)=64+52=116

if discriminant>0 then we have two real solutions

since √116 is not an integer, solutions are irrational

You might be interested in

The width of a rectangle is 5 less than twice its length. If the area of the rectangle is 88 cm², what is the

PtichkaEL [24]

Answer:

200cm^2

Step-by-step explanation:

When we need to find length of a rectangle we need to divide area by breadth.

Length of a rectangle = Area ÷ breadth.

ℓ = A ÷ b.

Similarly, when we need to find breadth of a rectangle we need to divide area by length.

Breadth of a rectangle = Area ÷ length.

7 0

3 years ago

What is the recursive formula for the sequence defined by the explicit equation an = -6 + 3n?

Ierofanga [76]

Answer:

an=an-1

Step-by-step explanation:

as it doesnt have -6 +3n

5 0

2 years ago

A boy bought an article for £9. He spent £4

Marina86 [1]

Answer:

Profit % = 39%

Step-by-step explanation:

Cost price of the article = 9

Price for repairing = 4

Therefore, Total cost of the article = 9 + 4 = 13

Selling price of the article = 18

Profit = 18 - 13 = 5

Hence,

$Profit \% = \frac{Profit}{Cost \ price} \times 100\\\\$

$= \frac{5}{13} \times 100\\\\=38.46 \%\\\\=38.5 \%$

Profit percent (to the nearest %) = 39%

4 0

3 years ago

8. What is the surface area of a square pyramid that has a base of 5 cm and

Katena32 [7]

The answer is 40. 5 x 8, height x base = area

5 0

3 years ago

Read 2 more answers

Jamie received £26 pocket money last week. He spent it as follows: 10% on sweets, 25% on magazines 15% on games How much did Jam

navik [9.2K]

Answer:

Total money left with Jamie = £13

Step-by-step explanation:

Jamie received pocket money = £26

He spent on sweets = 10% of total pocket money

Expense on magazines = 25% of the total money

Expense on games = 15% of the pocket money

Total expenditure on sweets, magazines and games = $\frac{10}{100}+\frac{25}{100}+\frac{15}{100}$

= $\frac{50}{100}$ Or 50% of the pocket money he received

Therefore, money left with Jamie = 50% of total money he received as pocket money

= $\frac{50}{100}\times 26$

= £13

6 0

3 years ago