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3 years ago

5

At the beginning of the week, the temperature was 15°. During the week, it decreased by 20°. What was the temperature by the end

of the week?

1 answer:

Mandarinka [93]3 years ago

7 0

Your answer would be -5°. 15 - 20 = -5.

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How do you reduce the ratio 104 to 1008

Helen [10]

Treat as fraction
104/1008
divide top and bottom by 2
52/504
divide by 2
26/252
divide by 2
13/126

13:126

8 0

4 years ago

I don't really get it.

geniusboy [140]

Answer:

6

Step-by-step explanation: <u><em>lcf~ the shortest amount it takes us to get to the desired number</em></u>

let's start with 9, we know 9x2=18 so now we go backwards down the number line to see if and of the numbers times another number will equal 18 also

so 8~ we have 8, 16,24~ no 18 so its not 8

now 7~ 7,14,21~no 18 so not 7

6~ 6, 12, 18~yes it took us 3 times to get to 18, but lets see if there is another

5~ 5,10,15,20~no 18 not 5 either

4~ 4,8, 12, 16, 20~ no 18, not 4 either

3~ 3,6,9,12,15,18~ yes but it took us 6 times to get to 18

now 2~ 2,4,6,8,10,12,14,16,18~ yes but it took us 9 times

so the answer would be 6

4 0

3 years ago

Someone help and please make sure the answer is right there is only 6 questions :(

defon

The answer is 30 it’s supposed to be equal to 180 130+20=150 and 150+30=180

5 0

3 years ago

Galactic Rotation Speed. We are located about 27,000 light-years from the galactic center and we orbit the center about once eve

Alexxandr [17]

Answer:

speed = 796142.197 km/hr

Step-by-step explanation:

solution

we consider here orbit around galactic center is circular so

circumference formula will be here

circumference C = 2πr ........1

here we know r = 27000

so

circumference C = 2 π × 27000

C = 169560 light year

so

we travel 169560 light year in 230000000 years

so distance will be

distance = $\frac{169560}{230000000}$

distance = 0.00073721 light year/year

and we know 1 year = 8760 hours

so 1 light year = 9.46027 × $10^{12}$ km

so

sped of moving is

speed = 0.00073721 × 9.46027 × $\frac{10^{12}}{8760}$ km/hr

speed = 796142.197 km/hr

5 0

4 years ago

Charlotte invests £5000.

lutik1710 [3]

Answer:

y = 1%

Step-by-step explanation:

From the formula;

Interest; i = PRT/100

P = £5000

R = 10%

After 1 year, we have;

i = 5000 × 10 × 1/100 = £500

Amount is now; 5000 + 500 = £5500

Since interest rate is now y% every year after the first one, then;

After 2nd year;

i = (5500 × y × 1)/100

i = 55y

So amount is now;

5500 + 55y

After 3rd year, interest is now;

i = (5500 + 55y) × y × 1/100

i = 55 + 0.55y²

Amount is now;

(5500 + 55y) + (55 + 0.55y²)

Since she has £5610.55 after 3 years, then;

(5500 + 55y) + (55 + 0.55y²) = 5610.55

0.55y² + 55y + 5555 - 5610.55 = 0

0.55y² + 55y - 55.55 = 0

From quadratic formula, y = 1%

5 0

3 years ago