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anygoal [31]
3 years ago
14

A teacher is comparing the quarter grades between two of her classes. She takes a random sample of 8 students from each class an

d lists the grades as shown. Find the mean for Class A.
Class A: 80, 83, 74, 91, 76, 87, 93, 72
Class B: 90, 75, 82, 86, 73, 85, 79, 94
Mathematics
1 answer:
Alja [10]3 years ago
8 0
The mean for class A is 82
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Ravi has $445 in his savings account. He wants to save at least $795. Write and solve an inequality to determine how much more m
Alexxandr [17]

Given

Ravi has $445 in his savings account.

He wants to save at least $795.

Write and solve an inequality to determine how much more money Ravi must save to reach his goal.

To proof

As given

amount of money in dollars Ravi must save to reach his goal be = d

Ravi has in his savings account = $445

He wants to save at least $795

than the inequality become in the form

445 + d \leq 795\\ 795 - 445 \leq d\\ 350\leq d

thus $350 Ravi must save to reach his goal.

Hence proved

3 0
3 years ago
Identify all factors of the expression 〖4x〗^2+17x-15.
Basile [38]

The factors of given expression are: -5 and 3/4

Step-by-step explanation:

Given equation is:

4x^2+17x-15

Making pairs for the mid-term 17x by factoring the product of co-efficient of 4x^2 and 15

4x^2+20x-3x-15

= 4x(x+5) - 3(x+5)

=(4x-3)(x+5)

Now

4x-3 = 0\\4x = 3\\x = \frac{3}{4}

x+5 = 0\\x = -5

Hence,

The factors of given expression are: -5 and 3/4

Keywords: Quadratic equation, factors

Learn more about quadratic equation at:

  • brainly.com/question/10435836
  • brainly.com/question/10541435

#LearnwithBrainly

8 0
4 years ago
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