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3 years ago

91 more than the square root of a number

Mathematics

1 answer:

Genrish500 [490]3 years ago

3 0

Answer:

Step-by-step explanation:

y = x 2 + 91

Explanation:

Let the number be x

, then Square of the number is x ^2

91 more than the square of a number" will be x^ 2 + 91

So, we can write it as an algebraic expression with two variables as :

y = x ^2 + 91

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Write an equation of the line that passes through the given point with the given slope

Inessa05 [86]

Did Yu Ever Find The Answer I got the same question??

8 0

3 years ago

A country has 155 years of oil reserves at the current rate of consumption. Suppose that the demand for oil in the country is 2,

Alex17521 [72]

Answer:

a) 125,220,046 barrels
b) 71.25 years

Step-by-step explanation:

Oil consumption:

2000000 barrels/year

Rate of increase of consumption:

2% = 0.02 per year

Total reserves

155*2000000 = 310000000 barrels

a) ....................................................................................

Total oil consumption at the end of 42 years:

2,000,000
2,000,000*1.02 =
2.000,000*1.02^2
...
2,000,000*1.02^41

Sum:

2000000*(1 + 1.02+ 1.02^2+ ...+ 1.02^41) =
2000000*(1.02^41 - 1)/(1.02 - 1) = 125,220,046 barrels

b) ....................................................................................

Oil reserves will last:

2000000*(1.02^x - 1)/(1.02 - 1) = 310000000
(1.02^x - 1)/0.02 = 155
1.02^x - 1 = 155*0.02
1.02^x =1 +3.1
1.02^x = 4.1
x log 1.02 = log 4.1
x = log 4.1 /log 1.02
x = 71.25 years

8 0

4 years ago

There are 660 counters in a bag 1/6 of the counters are red 25% are blue and the rest are green how many green counters are ther

allsm [11]

Answer:

385 counters

Step-by-step explanation:

Since 1/6 of the counters are red and 1/4 of the counters are blue, there are:

1 - (1 / 6) - (1 / 4) = 7 / 12

Multiply it to find green:

660 x (7 / 12) = 385 counters

6 0

3 years ago

How do you work these out im confused

Vitek1552 [10]

$\boxed {45)}$ Multiply 520 students by 20% (0.20).

520 * 0.20 = 104

Multiply 104 students by 12.5% (0.125).

104 * 0.125 = 13

13 students were on the wrestling team.

$\boxed {46)}$ dimes (d) = n + .80, nickels (n) = n

Make the dimes and nickels add up to $1.40 in an equation.

(n + .80) + n = 1.40

Combine like terms.

2n + .80 = 1.40

Subtract .80 from both sides.

2n = 0.60

Divide both sides by 2.

n = 0.30

Divide this by 0.05 (how many nickels are in a dollar).

0.30/0.05 = 6

d = n + 0.80 ⇒ 0.30 + 0.80 = 1.10

Divide this by 0.10 (how many dimes are in a dollar).

1.10/0.10 = 11

There are 6 nickels and 11 dimes in the bank.

4 0

3 years ago

What is the product? (-35 +21)(4s-t)

8090 [49]

=-35(4s-t)+21(4s-t)
=-140s+35t+84s-21t
=-140s+84s+35t-21t
=-56s+14t

5 0

3 years ago

Read 2 more answers