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3 years ago

I need help on this plz help

Mathematics

2 answers:

Lera25 [3.4K]3 years ago

4 0

They will have the same amount after 5 car washes
the savings will be $100

svlad2 [7]3 years ago

3 0

Answer:

5 carwashes, Josh: $ 100 savings, Sandra: $100 savings

Step-by-step explanation:

First we need to find each of their formulas.

Formula for Josh: 50+10c=s

Formula for Sandra:25+15c=s

We can set these two to be equal to each other in order to find how many carwashes it takes for them to have the same amount of money.

50+10c=25+15c

25+10c=15c

25=5c

c=5

after 5 car washes, they will have the same amount of money.

now that we know that, we can plug that into each equation to find each of their savings after the 5 carwashes.

Josh's savings:

50+10c=s

plug in the amount of carwashes,

50+10*5=s

50+50=s

s=100 dollars of savings for Josh

Sandra's savings:

25+15c=s

plug in the amount of carwashes,

25+15*5=s

25+75=s

s=100 dollars of savings for Sandra

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Everyone shop in her favorite store target she buy T-shirts in pair of jeans that cost $20 she’s been a total of 80 or purchase

kumpel [21]

Step-by-step explanation:

so you divide

$80 \div 20 = 4$

so each t-shirt costs 4$

5 0

2 years ago

Of all the people applying for a certain job, 80% are qualified and 20% are not. The personnel manager claims that she approve

motikmotik

Answer:

69.23% probability that a person is not qualified if he or she was not approved by the manager.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes:

In this problem, we have these following probabilities:

80% probability that a person is qualified

20% probability that a person is not qualified.

90% probability that a qualified person is approved.

10% probability that a qualified person is not approved.

10% probability that an unqualified person is approved.

90% probability that an unqualified person is not approved.

Find the probability that a person is not qualified if he or she was not approved by the manager.

Desired outcomes

Unqualified and not approved.

20% are not qualified. Of those, 90% were not approved. So

$0.9*0.2 = 0.18$

Total outcomes:

Qualified and not approved or unqualified and not approved.

80% are qualified. Of those, 10% were not approved

20% are not qualified. Of those, 90% were not approved. So

$0.8*0.1 + 0.9*0.2 = 0.26$

Probability

$P = \frac{0.18}{0.26} = 0.6923$

69.23% probability that a person is not qualified if he or she was not approved by the manager.

7 0

3 years ago

Find the value of X?

il63 [147K]

Answer:

C.92

Step-by-step explanation:

I don't know just random picking sorry

6 0

3 years ago

Consider the following function.f(x) = 16 − x2/3Find f(−64) and f(64).

malfutka [58]

Answer: $f(-64)=0$

$f64)=0$

Step-by-step explanation:

The given function : $f(x)=16-x^{2/3}$

When we substitute x= -64, we get

$f(x)=16-(-64)^{2/3}$

Since , $64=4\times4\times4=4^3$

So, $-64=-4\times-4\times-4=-4^3$

That means $f(-64)=16-(-64)^{2/3}=16-(-4^3)^{2/3}$

$=16-(-4)^2=16-(-4\times-4)=16-16=0$

i.e. $f(-64)=0$

Similarly, When we substitute x= 64, we get

$f(x)=16-(64)^{2/3}$

Since , $64=4\times4\times4=4^3$

That means $f(64)=16-(64)^{2/3}=16-(4^3)^{2/3}$

$=16-(4)^2=16-16=0$

i.e. $f64)=0$

3 0

4 years ago

Give an example of tangents in the real world that have not been presented in this lesson. Explain how you know the tangent and

EastWind [94]

Answer:

I'll give you three examples of tangents in the real world:

Ski on a snowy mountain.
A street under a car wheel.
The line formed between the armpit and a deodorant type roll on.

Step-by-step explanation:

Remember a tangent is a straight line that touches a curve in a point, by this reason, you can search examples where there are curves (like the snowy mountain, car wheel and the deodorant type roll on in the answer), touched by a beeline (ski, street, and armpit) in just a point, in the same form, you can use as an example a ball on a soccer field and others. I don't know what examples gave you in the lesson but I'm sure at least one of the examples I give you must function.

3 0

3 years ago