1 year ago

Help help help help pls!!! I’m begging I’ll give brainliest!!!

Mathematics

1 answer:

photoshop1234 [79]1 year ago

3 0

Answer: ...

Ok done. Thank to me :33

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Petrol costs 99p per litre. How much would 47 litres cost?

Radda [10]

Step-by-step explanation:

$99 \times 47 = 517 \times 9 = 4653$

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3 years ago

The intensity of light bulb measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from th

krek1111 [17]

Answer:

I(7) = 22.96 W/m²

Step-by-step explanation:

Let intensity of light, be I(d) where d is distance. There must be a proportionality factor K such as

I(d) = K /d²

Now for d = 5 m I(d) = K* 1/d²

then 45 * 25 = K

K = 1125

To find the intensity when the distance from the light bulb is 7 m away

I(7) = K / 49

I(7) = 1125/49 W/m²

I(7) = 22.96 W/m²

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3 years ago

In an arithmetic sequence {an}, if a1 = 5 and d = 3, find a72. A) 216 B) 218 C) 221 D) 223

Phoenix [80]

The arithmetic sequence with the given condition is determined recursively by

$\begin{cases}a_1=5\\a_n=a_{n-1}+3&\text{for }n>1\end{cases}$

So we have

$a_2=a_1+3$

$a_3=a_2+3=a_1+3(2)$

$a_4=a_3+3=a_1+3(3)$

and so on with the general pattern

$a_n=a_1+3(n-1)$

This means the 72nd term in the sequence is

$a_{72}=a_1+3(72-1)=5+3(71)=218$

so the answer is B.

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3 years ago

James wants to go buy a chocolate bar from a grocery store. The chocolate bar costs $5 and will have a 13% sales tax applied to

Tresset [83]

Answer:

part a- if he really wants it then yes but its overpriced with the tax. part b- about $5.80 CORRECT ME IF IM WRONG I USED A NEW APP

Step-by-step explanation:

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2 years ago

Find the gradient of the line segment between the points (2,2) and (0,6).

Alexeev081 [22]

Answer:

slope-intercept formula -----> Y2-Y1/X2-X1

Step-by-step explanation:

X1 = 2 X2= 0

Y1 = 2 Y2=6

6-2/0-2= -2

G= -2

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3 years ago