ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Math Videos 40 videos

PSAT 1.1 Math Diagnostic
312 Views

PSAT 1.1 Math Diagnostic. If a rabbit consumes 3 meals a day, how many grams of food will a rabbit consume in 7 days?

PSAT 1.8 Math Diagnostic
211 Views

PSAT 1.8 Math Diagnostic. What is one value of x?

PSAT 1.38 Math Diagnostic
180 Views

PSAT 1.38 Math Diagnostic. What is f(g(x))?

See All

PSAT 1.28 Math Diagnostic 178 Views


Share It!


Description:

PSAT 1.28 Math Diagnostic. What is the maximum number of text messages he can send in one month for Plan B to cost no more than Plan A?


Transcript

00:00

Thank you We sneak And here's your shmoop too sure

00:05

brought to you by text messages every time we see

00:08

an abbreviation we don't recognize we always wonder whether we're

00:11

just really out of touch or someone's cat walked across

00:14

their iphone Mr abdul is choosing between two cellphone plans

00:19

plant a charge is a flat fee of three bucks

00:21

a month and twenty cents per text message Plan b

00:24

charges sixty cents per text message but offers a monthly

00:27

rebate of seven bucks if mr abdul chooses plan b

00:31

what is the maximum number of text messages he consented

00:34

one month Or plan b to cost no more than

00:38

plan a And here the vigilante All right we'll wait

00:42

Is mr abdul buying his phone for himself or for

00:45

his fourteen year old daughter kelly Because she just got

00:48

dumped by jonathan reynolds his past sunday and she is

00:51

gonna have a lot of texting to do over the

00:53

next few weeks We're just saying i'm looking out for

00:56

you there mr f okay so we're looking at options

00:58

of zero for eight twenty five spoof we're really hoping

01:01

the correct answer is d because we pretty much just

01:04

sent a text messages By the time we walked out

01:06

on the horizon story waken rewrite plan a is a

01:09

linear equation and any time we make a word problem

01:12

look matthew well that's a good start so let's just

01:15

do it since it twenty cents for a message and

01:17

a number of messages is what we don't know We

01:20

can call that point two x one x would be

01:23

a whole dollar and then tack on a plus three

01:26

for three dollars monthly charge so we get point two

01:28

x plus three Well plan b is sixty cents per

01:31

message with a seven dollars monthly rebate So point six

01:34

x minus seven now we're trying to figure out where

01:37

these two would meet in the middle cost wise so

01:39

let's set him equal to each other Tothe point two

01:41

x plus three equals point six x minus seven we

01:44

can add seven of both sides to get point two

01:47

x plus ten equals point six x then subtract point

01:50

two x from both sides to get ten equals point

01:53

for x and finally divide both sides by point for

01:56

to get x equals twenty five which is option d

01:59

mister ray we strongly suggest you just go with plan

02:02

a So you can text to your heart's content without

02:04

breaking the bank Then again if this for kelly we

02:07

might actually recommend plan c hu tin cans and a 00:02:09.98 --> [endTime] length of string Your wallet will thank you

Related Videos

Secret Ingredients
391 Views

PSAT 1.3 Math Narrative Walkthrough. How many full packages of secret ingredient does the company have to buy to make one 50-gallon batch?

PSAT 1.1 Reading Diagnostic
1006 Views

PSAT 1.1 Reading Diagnostic. The main purpose of the first two paragraphs is to...what?

PSAT 2.2 Reading Diagnostic
379 Views

PSAT 2.2 Reading Diagnostic. What is the main rhetorical effect of this phrase in the second paragraph?

PSAT 1.3 Writing Diagnostic
282 Views

PSAT 1.3 Writing Diagnostic. To make the paragraph most logical, sentence 2 in the second paragraph should be placed...where?

PSAT 1.4 Writing Diagnostic
239 Views

PSAT 1.4 Writing Diagnostic. Which choice most effectively combines the two sentences in the underlined portion?