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Gala2k [10]
3 years ago
9

-3a + 5 =-1 please help me

Mathematics
2 answers:
Law Incorporation [45]3 years ago
4 0

Answer:

2

Step-by-step explanation:

To find <em>a</em> we need to first isolate it. There is a 5 on the left side along with the -3a that has to be moved.

To do this, we can subtract 5 from both sides of the equation using the subtraction property of equality.

-3a + 5 - 5 = - 1 - 5

-3a = -6

Now that the a term is isolated, the next step is to remove the coefficient.

Let's use the division property of equality and divide both sides of the equation by -3.

-3a/-3 = -6/-3

a = 2

ludmilkaskok [199]3 years ago
4 0

Answer:

2

Step-by-step explanation:

-3a + 5 = -1

5+1 =3a

6 =3a

divide both sides by 3

6/3 = 3a/3

2=a

Therefore a=2

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You have $5600. The best interest rate you can find is 3%
EleoNora [17]

Answer:

18 years

Step-by-step explanation:

The formula for computing accrued amount A for a principal of P at an interest rate of r(in decimal) compounded n times in a year for t years is given by

A = P(1 + \frac{r}{n})^{nt}

Note that r is percentage converted to decimal. So 3% = 3/100 = 0.03

We can rearrange the above equation to:

\frac{A}{P} = (1 + \frac{r}{n})^{nt}

Taking logs on both sides

log(\frac{A}{P}) = log(1 + \frac{r}{n})^{nt}

This gives

log(\frac{A}{P}) =nt \times log(1 + \frac{r}{n})\\So,\\nt = \frac{log(\frac{A}{P})}{ log(1 + \frac{r}{n})}

In this particular problem, n = 4, , A= 9600, P = 5600, r =0.03, so r/n = 0.03/4 = 0.0075

1 + r/n = 1+0.0075 = 1.0075

4t = log(9600/5600)/log(1.0075) = log(1.714) / log(1.0075) = 0.234 /0.00325 = 72

t = 72/4 = 18 years

4 0
2 years ago
Each day Donna and Mary toss a coin to see who buys the other person coffee ​($2.34 a​ cup). One tosses and the other calls the
netineya [11]

Answer:

yes

Step-by-step explanation:

Each day Donna and Mary toss a coin to see who buys the other person coffee ​($2.34 a​ cup). One tosses and the other calls the outcome. If the person who calls the outcome is​ correct, the other buys the​ coffee; otherwise the caller pays. Assume that an honest coin is​ used, that Mary tosses the​ coin, and that Donna calls the outcome.

7 0
3 years ago
Suppose you have 100 ft of string to rope off a rectangular section for a bake sale at a school Fair. The function A=x^2+50x giv
cupoosta [38]

Answer:

Therefore the width is 25 feet for getting maximum area.

The maximum area of the rectangle is 625 square feet.

Therefore the range is 0≤A≤625.

Step-by-step explanation:

Given function is

A = - x²+50x

We know that ,

If y = ax²+bx+c

For the maximum x=-\frac{b}{2a}

Here a = -1 , b= 50 and c=0

Therefore the width x= -\frac{50}{2.(-1)} = 25

Therefore the width is 25 feet for getting maximum area.

The maximum area =[ -(25)²+50.25] square feet

                                 = 625 square feet

The area can not be negative and maximum area is 625 square feet.

Therefore the range is 0≤A≤625.

5 0
3 years ago
Angelique is building a model of her home. Her house is 24 feet tall, and the home in her model is 8 inches tall. She wants to a
Leno4ka [110]
Her house is 24 feet tall = 24*12 inches = 288 inches

SO, 288/8 = 36 (Scaling factor)

5feet * 12 inches/feet = 60 inches

60 inches /36 = 1.667 inches.................<  Figurine
3 0
3 years ago
Find the quadractic function to model the values in the table.
Shtirlitz [24]

Answer: y=3x^2+3x-3

(the first option)

7 0
3 years ago
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