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3 years ago

9

Jeffery has grades of 93 and 81 on the first two testes of the quarter. Progress reports are sent home after the third test. He

needs an A average. What grades doe Jeffery at least have to make on the third test?

1 answer:

navik [9.2K]3 years ago

5 0

Answer:

96 or 97

Step-by-step explanation:

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Find 1/9 as many as 3 divided by 5

sergeinik [125]

(3 ÷ 5) ÷ 9 there you go.

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3 years ago

2. The table shows distance, y, that Mario runs in x minutes.

Zepler [3.9K]

Assuming the left is minutes and the right is distance, Mario runs 1 mile in 7 minutes
(a) y=x/7
(b) the rate of change is 7
(c) if he ran for 70 minutes then his distance is 10 miles.
*for (c) just plug in the number given. Replace it with x and divide it by 7.*

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2 years ago

Given the geometric sequence where a1 = 3 and the common ratio is −1, what is the domain for n?

liubo4ka [24]

All integres n >= 1

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3 years ago

Read 2 more answers

Evaluate:<br> g(x) = 3•2x+2 + 3<br> g(3)

Studentka2010 [4]

Answer:23

Step-by-step explanation:

3·2（3）+2+3

=3·6+2+3

=23

6 0

3 years ago

5^(2x-1)+5^(x+1)=250<br> how do you solve?<br> thank you

zepelin [54]

Answer:

<em>x = 2</em>

Step-by-step explanation:

<u>Exponential Equations</u>

Solve:

$5^{2x-1}+5^{x+1}=250$

Separate each exponential:

$5^{2x}5^{-1}+5^{x}5^{1}=250$

Operating:

$\displaystyle \frac{5^{2x}}{5}+5^{x}5=250$

Multiplying by 5:

$5^{2x}+25\cdot5^x=1250$

Rearranging:

$5^{2x}+25\cdot5^x-1250=0$

Recall that:

$5^{2x}=(5^{x})^2$

$(5^{x})^2+25\cdot5^x-1250=0$

Calling

$y=5^{x}:$

$y^2+25y-1250=0$

Factoring:

$(y-25)(y+50)=0$

There are two possible solutions:

y=25

y=-50

Since

$y=5^{x}$

y cannot be negative, thus:

$5^{x}=25=5^2$

The solution is:

x = 2

8 0

3 years ago