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3 years ago

14

Giving thanks and brainliest for best answer <3

1 answer:

Papessa [141]3 years ago

5 0

It’s definitely 100% B sorry if I’m late :)

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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

Find the smallest of two consecutive even integers if the square is 10 more than the larger

djverab [1.8K]

I think your answers are 4 and 6

7 0

3 years ago

PLEASE HELP THIS IS VERY IMPORTANT I WILL GIVE U BRAIN THING IF ITS CORRECT NO LINKS. PLEASE

AlladinOne [14]

Answer:

1. 21+35

2. 5

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Identify the number that does not belong with the other three. Explain your reasoning. 50.1 repeating 1, negative 50 over 2, neg

ivolga24 [154]

50.1 repeateding because that is the only positive number

5 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP!!!

Pie

The formula for percent error is:

((Approximate value - exact value) / exact value) x 100

1) 14-12 = 2

2/12 = 0.1666

0.166 x 100 = 16.7% (Rounded to nearest tenth)

2) 231 - 215 = 16

16/215 = 0.74419

0.74419 x 100 = 7.4419% ( Round as needed)

3) 17.1 - 16.5 = 0.6

0.6/16.5 = 0.36364

0.36364 x 100 = 3.6364% (Round off as needed)

4) 1081 - 1150 = -69

-69/1150 = -0.06

-0.06 x 100 = -6% = 6% error

7 0

3 years ago

Read 2 more answers