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3 years ago

5x-3=21-x please someone answer

Mathematics

2 answers:

ExtremeBDS [4]3 years ago

6 0

Answer:

X=4

Step-by-step explanation:

The first thing you would do is to make it so there is only x's on one side. To do this add the x on both sides
This would make it so you have 6x-3=21
Plus the 3 on both sides
This would give you 6x=24
Do 24÷6 giving you 4
X=4

wolverine [178]3 years ago

5 0

Answer:

X=4 Hope it helps Lol

Step-by-step explanation:

5*x-3-(21-x)=0

Step by step solution :

Step 1 :

Pulling out like terms :

1.1 Pull out like factors :

6x - 24 = 6 • (x - 4)

Equation at the end of step 1 :

Step 2 :

Equations which are never true :

2.1 Solve : 6 = 0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

2.2 Solve : x-4 = 0

Add 4 to both sides of the equation :

x = 4

One solution was found :

x = 4

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3 years ago

Solve the inequality. 5 – 3a < –10

Murljashka [212]

Answer:

A=5

Step-by-step explanation:

5-3a<-10 is the same as

5-3a=-10

So to solve it just solve for a.

subtract 5 from both sides

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dived -3 from both sides to get a alone

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hope this helps!

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4 years ago

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3 years ago

A community college has a math placement exam that has a mean of 65 and a standard deviation of 8.2. If a student takes the exam

Marat540 [252]

Answer:

The score that cuts off the bottom 2.5% is 48.93.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 65, \sigma = 8.2$