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geniusboy [140]

3 years ago

12

15x8-x=4(2x+20) solve

1 answer:

Cloud [144]3 years ago

6 0

Answer:

x≈ −1.21039852,1.25324234 assuming was the exponent to 15x

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There are 3x-2 trees planted in each row of a rectangular Parcel of land. If there are a total of 24x-16 trees planted and the p

4vir4ik [10]

Let's call the number of rows 'R' . (Clever ?)

There are (3x -2) trees in each row, and there are 'R' rows,
so the total number of trees is [ R times (3x-2) ].

But the problem told you that the total number of trees is (24x-16).
So
   R(3x - 2) = (24x - 16)

For a quick, happy ending, how about factoring '8' out of the right side:

   R(3x - 2) = 8(3x - 2)

Is it jumping out at you yet ?
If not, then divide each side by (3x - 2) :

   <em> <u> R = 8</u></em>

There are eight (8) rows of trees.

5 0

3 years ago

The repayment schedule is for a $1,300 loan at 7.5% for 6 months. What is the amount for interest at payment 5?

Jlenok [28]

Answer:

$2.77

Step-by-step explanation:

Here's one way to do it.

Data:

We must express the interest rate on a monthly basis.

i = 7.5 %/yr = 0.625 %/mo = 0.006 25

A = $1300

n = 6 mo

A. Monthly payments

The formula for the monthly payment (P) on a loan of A dollars that is paid back in equal monthly payments over n months, at an annual interest rate of i % is

$P = A(\frac{i}{1-(1+i)^{-n}})$

Calculation:

$P = 1300(\frac{0.006 25}{1-(1+0.006 25)^{-6}})$

$P = \frac{8.125}{{1- {1.006 25}}^{-6}}$

$P = \frac{8.125}{1 - 0.9633}$

$P = \frac{8.125}{0.03669}$

P = $221.43

B. Total amount paid over six months

Paid = 6 × 221.43

Paid = $1328.58

C. Amount paid after four months

Paid = 4 × 221.43

Paid = $885.72

D. Balance owed after four months

Owed = 1328.58 - 885.72

Owed = 1341.14 – 1121.08

Owed = $442.86

E. Interest included in Payment 5

I = Pi

I = 442.86 × 0.006 25

<em>I = $2.77 </em>

The interest included in Payment 5 is $2.77.

3 0

3 years ago

There is a bag with only red marbles and blue marbles.

natulia [17]

Answer:

There must be 35 red marbles.

Step-by-step explanation:

This question can be solved using a rule of three.

A probability is the number of desired outcomes divided by the number of total outcomes.

The probability of randomly choosing a red marble is 7/9.

This means that for each set of 9 marbles, 7 must be red.

There are 45 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be.

How many red marbles out of 45?

7 red - 9 marbles

x red - 45 marbles

$9x = 45*7$

Simplifying by 9

$x = 5*7$

$x = 35$

There must be 35 red marbles.

6 0

3 years ago

I got it incorrect so please help for where each one goes

OLEGan [10]

The first one is right and the third one is right, but you need to switch the 15% and the 95%.

In #2, it's asking for the kids that <em>are not</em> Michael, so it'd be 18/19. Which is then rounded to roughly 95%.

#4 asks for 6/40 = 15%

6 0

3 years ago

Read 2 more answers

5. Ms. Johnson has 50 students in Period 5. In

Citrus2011 [14]

Answer:

60% of the students are boys

8 0

3 years ago