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4 years ago

15

Amy’s current grades for her assignments in math class are 85 , 90 , 95 and 80. What grade does she have to earn on her next ass

ignment to attain an average of 90?

1 answer:

Lubov Fominskaja [6]4 years ago

5 0

Answer:

100

Step-by-step explanation:

100+90+85+95+80= 450,

450/5=90

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What sequence is modeled by the graph below?

Lady bird [3.3K]

ANSWER

$a_n= \frac{1}{2}( {2}^{n - 1} )$

EXPLANATION

The corresponding ordered pairs from the graph are:

(2,1) (3,2) (4,4) (5,8)

The y-values are:

1,2,4,8

The first term term is the term before 1,this has to be.

$a_1= \frac{1}{2}$

The common ratio is

$r = \frac{2}{1} = 2$

The nth term is given by

$a_n=a_1 {(r}^{n - 1} )$

Let's substitute the values to get,

$a_n= \frac{1}{2} \times {(2}^{n - 1} )$

This simplifies to,

$a_n= \frac{1}{2} {(2}^{n - 1} )$

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4 years ago

What's the circumference of a

grandymaker [24]

Answer:

56.55 inches

Step-by-step explanation:

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3 years ago

Estimate each quotient. show your work. 165÷4

Serggg [28]

Answer: 41 1/4

Step-by-step explanation: 160/4=40

5/4= 1 1/4

LIKE IF CORRECT

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3 years ago

Read 2 more answers

To decrease an amount by 24% what single multiplier would you use

guapka [62]

100-24=76
76%=76/100=0.76
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4 years ago

7 qt. of a 27% saline solution was mixed

mamaluj [8]

Answer:

24% saline

Step-by-step explanation:

Find how much saline is in both solutions:

7(0.27)

= 1.89

3(0.17)

= 0.51

Add this together:

1.89 + 0.51

= 2.4

Since there are 10 quarts in total, the concentration of the mixture can be found by dividing 2.4 by 10:

2.4/10

= 0.24

So, the concentration of the mixture is 24% saline

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3 years ago