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dlinn [17]
3 years ago
8

2 + 1/6a = -4 what is a

Mathematics
1 answer:
horsena [70]3 years ago
6 0

Answer:

I found that it was -1, but everything online is telling me -36.

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A collection of five coins has a value of $1 and consists of dimes and
DENIUS [597]

For this case we propose a system of equations. We have to:

x: Let the variable that represents the number of dimes

y: Let the variable that represents the number of quaters

We know that:

One dime equals 10 cents, $0.10

A quater equals 0.25 cents, $0.25

According to the statement we have:

x + y = 5\\0.10x + 0.25y = 1

We multiply the first equation by -0.10:

-0.10x-0.10y = -0.5

We have the following equivalent system:

-0.10x-0.10y = -0.5\\0.10x + 0.25y = 1

We add the equations:

-0.10x + 0.10x-010y + 0.25y = -0.5 + 1\\0.15y = 0.5\\y = \frac {0.5}{0.15}\\y = 3.33

Approximately 3 quater coins

x = 5-y = 5-3 = 2

And two dimes

Answer:

3 quater

2 dimes

4 0
2 years ago
Eric drove 804 miles in 12 hours. At the same rate, how many miles would he drive in 8 hours?
dezoksy [38]
537 miles..........................
6 0
3 years ago
Read 2 more answers
Liz wants to buy her favorite musical group’s new CD. The CD costs $15.24, including tax. Liz gives the store clerk a twenty-dol
Mila [183]
$20.00 - $15.24 = $4.76 in change. I'd say review decimal subtraction which you should have learned in fourth or fifth grade. Hope this helps!
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3 years ago
Find each value if f(x) = 2x- 1 and g(x) = 2 - x2,<br> f(12)<br> f(0)
Ksivusya [100]
Use pothomath that app is good
For math
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3 years ago
The st. joe company grows pine trees and the average annual increase in tree diameter is 3.1 inches with a standard deviation of
77julia77 [94]

Solution: We are given:

μ=3.1,σ=0.5,n=50

We have to find P(Mean <2.9)

We need to first find the z score

z= (xbar-μ)/(σ/sqrt(n))

=(2.9-3.1)/(0.5/sqrt(50))

=(-0.2)/0.0707

=-2.83

Now we have to find P(z<-2.83)

Using the standard normal table, we have:

P(z<-2.83)=0.0023

Therefore the probability of the sample mean being less the 2.9 inches is 0.0023

5 0
2 years ago
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