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Olenka [21]
3 years ago
14

A math class is having a discussion on how to determine if the expressions 4 x minus x + 5 and 8 minus 3 x minus 3 are equivalen

t using substitution. The class has suggested four different methods. Which describes the correct method?
Mathematics
2 answers:
irga5000 [103]3 years ago
4 0

Answer: blueface baby

Step-by-step explanation:

kondor19780726 [428]3 years ago
3 0

Answer:

Both expressions should be evaluated with one value. If the final values of the expressions are the same, then the two expressions must be equivalent.  

Step-by-step explanation:

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A truck driver drove 48 miles in 45 minutes.At this rate,how many miles can the truck drive in one hour?
murzikaleks [220]

Answer:

64 miles

Step-by-step explanation:

Number of miles driven in 45 minutes = 48 miles

We need to find how many miles will the truck drive drive in one hour. Since the rate is the same, the distance covered in each minute remains the same.

Number of miles driven in 1 minute =  miles

Since, 1 hour = 60 minutes, we can write:

The number of miles driven in 1 hour (60 minutes) =  miles

This means the truck driver can drive 64 miles in an hour.

HOPE THIS HELPS! :)

7 0
3 years ago
Read 2 more answers
A light bulb has a lifetime X that is exponentially distributed with a mean 340 hours. Find the probability that the bulb lifeti
LUCKY_DIMON [66]

Answer:

0.7026

Step-by-step explanation:

Let X denote the lifetime of light bulb. Given X \sim Exp(\lambda) where the mean is E(X) = 340 =\frac{1}{\lambda} \implies \lambda = \frac{1}{340} = 0.00294.

Recall that,

\displaystyle P(X>x) = 1 - \int_0^x e^{-\lambda x} = 1 - (1 - e^{-\lambda x} = e^{-\lambda x}

\displaystyle P(X>220 | X>100) = \frac{P(X>220,X>100)}{P(X>100)} = \frac{e^{-\lambda \times 220}}{e^{-\lambda \times 100}} = \frac{0.5236}{0.7452} = 0.7026

7 0
3 years ago
8 The sum of four consecutive odd integers is 96. What are the numbers?
grigory [225]

Answer:The sum of all is 21+23+25+27 = 96.

Step-by-step explanation:

5 0
3 years ago
1
kakasveta [241]
1/8 or D, because 1/2 divied by 4 equals 1/8. Hope I helped! I need some help on one question for me.

7 0
3 years ago
Read 2 more answers
Write 3.1405 x 10° in standard form
-BARSIC- [3]

Answer:

<em>3.1405</em>

Step-by-step explanation:

10^{0} = 1   ⇒ This is always the case

So,

3.1405 × 1 = 3.1405

3 0
3 years ago
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