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amm1812
3 years ago
9

0.3(n-5)=0.4-0.2(n-7) solve for n !!!!!!

Mathematics
1 answer:
ipn [44]3 years ago
4 0
Let's solve your equation step-by-step.

0.3(n−5)=0.4−0.2(n−7)

Step 1: Simplify both sides of the equation.

0.3(n−5)=0.4−0.2(n−7)

(0.3)(n)+(0.3)(−5)=0.4+(−0.2)(n)+(−0.2)(−7)(Distribute)

0.3n+−1.5=0.4+−0.2n+1.4

0.3n−1.5=(−0.2n)+(0.4+1.4)(Combine Like Terms)

0.3n−1.5=−0.2n+1.8

0.3n−1.5=−0.2n+1.8

Step 2: Add 0.2n to both sides.

0.3n−1.5+0.2n=−0.2n+1.8+0.2n

0.5n−1.5=1.8

Step 3: Add 1.5 to both sides.

0.5n−1.5+1.5=1.8+1.5

0.5n=3.3

Step 4: Divide both sides by 0.5.

0.5n0.5=3.30.5

n=6.6

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Barbara purchased a home entertainment center for $2,665 using an 18-month deferred payment plan with an interest rate of 24.36%
Andre45 [30]

Answer:

P = $ 144.99

Step-by-step explanation:

Given data:

cost of home entertainment center is $2665

duration of deferred payment plan is 18 month

interest rate is 24.36%

Total amount to be paid is = P(1+ \frac{R}{100})^t

                                          = 2665 (1+ \frac{24.36}{100})^1.5

A = 3695.88

From the information in the questioon this amount is to be paid in 3 year . Thus we have

Monthly payment is =

P = \frac{r(Pv)}{1 - (1+ r)^{-n}}

p = monthly payment

Pv = present value = 3695.88

r =rate per period = \frac{24.36}{12} = 0.020

n = number of period = 12\times 3 = 36

plugging all value in the above formula

P = \frac{0.020\times 3695.88}{1 - (1+0.020)^{-36}}

P = $ 144.99

5 0
3 years ago
Given that ∠ABD = 71°, which equation could be used to solve problems involving the relationships between ∠DBC and ∠ABC?
dexar [7]

Step-by-step explanation:

one could be that all the angles add up to 180

180-71= 109

∠DBC and ∠ABC must add up to 109 degrees

5 0
3 years ago
A container of beads contains: 8 red beads, 6 yellow beads, and 6 green beads. A bead will be drawn from the basket and replaced
Sav [38]
The answer will be 14/20 because there a total of 20 beads and 8 red beads and 6 green beads which is 14 out of 20 total beads
4 0
3 years ago
Read 2 more answers
I am a 2 digit number the sum of my digits is 6. I have both 2 and 7 as factors
gogolik [260]
The number is 5 and the factor is 1
6 0
3 years ago
Volume? Correct answers please
goldfiish [28.3K]

Answer:

V = 1385.44

Step-by-step explanation:

The equation for volume is V = π r 2 h! Where V = volume, r = radius <em>(half the diameter)</em>, and h = height. Now lets substitute what we know into this equation!

<em>Since we are giving the diameter (14) we must divide by 2 to find the radius.</em>

                         14 ÷ 2 = 7

Radius = 7

Height = 9

V = ?

Time to plug these values in!

V = π 7^{2} (9)

<em>We have to distribute </em><em>pi to 7 square that term </em><em>and then </em><em>multiply the value by 9</em><em>. </em>

<em />

V = 1385.44

Hope this Helps! :)

<em>Have any questions? Ask below in the comments and I will try my best to answer.</em>

-SGO

7 0
3 years ago
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