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3 years ago

What is 4.5a+7+3.5a+2

Mathematics

1 answer:

Nitella [24]3 years ago

3 0

Answer:

8a+9

Step-by-step explanation:

You have to add the like terms.

4.5a+7+3.5a+2

4.5a+3.5a=8a

7+2= 9

8a+9

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Which is the solution of the quadratic equation (4y – 3)2 = 72? y = StartFraction 3 + 6 StartRoot 2 EndRoot Over 4 EndFraction a

Aleksandr-060686 [28]

Answer:

$y = \frac{3 + 6\sqrt{2} }{4}$ and $y = \frac{3 - 6\sqrt{2} }{4}$

y = StartFraction 3 + 6 StartRoot 2 EndRoot Over 4 EndFraction and y = StartFraction 3 minus 6 StartRoot 2 EndRoot Over 4 EndFraction

Step-by-step explanation:

The given quadratic equation is (4y - 3)² = 72

We have to solve this equation for y.

Now, 4y - 3 = ± 6√2

⇒ 4y = 3 ± 6√2

⇒ $y = \frac{3 + 6\sqrt{2} }{4}$ and $y = \frac{3 - 6\sqrt{2} }{4}$

Therefore, the solution is y = StartFraction 3 + 6 StartRoot 2 EndRoot Over 4 EndFraction and y = StartFraction 3 minus 6 StartRoot 2 EndRoot Over 4 EndFraction (Answer)

6 0

3 years ago

Read 2 more answers

Frank and Mary are traveling to the beach which is 520 mi from their home if they travel at an average speed of 65 miles per hou

Dvinal [7]

Answer:

It will take 8 hours for Frank and Mary to get to the beach

Step-by-step explanation:

Step 1: Give expression for calculating

d=s×t

where;

d=distance traveled i miles

s=speed in miles per hour

t=time in hours

in our case;

d=520 miles

s=65 miles per hour

t=unknown

Step 2: Solve for the unknown, t

In order to solve for t, the expressions can be rearranged as follows ;

t=d/s

replacing values for d and s;

t=520/65

t=8 hours

It will take 8 hours for Frank and Mary to get to the beach

4 0

4 years ago

Help plz I don’t get it

laila [671]

(I will do the first two parts of each question)

1a. 13 is only divisible by 1 and 13, so they are its factors.

1b. 30 can be divided by 1 and 30, and 2*15=30, 3*10=30, and 5*6=30, so 30's factors are 1, 2, 3, 5, 6, 10, 15, and 30.

2. 75's factors are: 1, 3, 5, 15, 25, and 75. So, there can be 75 piles of 1, 25 piles of 3, 15 piles of 5, etc. (3 more)

3a. 3*1=3, 3*2=6, 3*3=9, etc. so the first 5 multiples of 3 are: 3, 6, 9, 12, 15

3b. Same as before, so: 10, 20, 30, 40, 50

3 0

3 years ago

Read 2 more answers

The point slope form of the equation of the line that passes Through (-4,3) and (12,1) is y-1=1\4(x-12) what is the standard for

Leokris [45]

Something is wrong here, the slope is off...

m=(y2-y1)/(x2-x1)

m=(1-3)/(12--4)

m=-2/16

m=-1/8

So the point slope form should be:

y-1=(-1/8)(x-12)

The standard form of the line is ax+by=c so we need to rearrange it to reflect the this form...multiply both sides by -8 to get:

8-8y=x-12 subtract 8 from both sides

-8y=x-20 subtract x from both sides

-x-8y=-20 by convention, the coefficient of x should be positive, multiply both sides by -1

x+8y=20

....

Just to show that the equation given you is incorrect..

y-1=(x-12)/4 using the point (-4,3)

3-1=(-4-12)/4

2=-16/4

2=-4 which is obviously incorrect...(they had the wrong slope for the two points given)

5 0

4 years ago

URGENT!!!!

zhannawk [14.2K]

Answer:

Write a system of equations

Step-by-step explanation:

2x + y = 15

3x - y = 20

5x = 35

x = 7

2(7) + y =15

y = 1

5 0

3 years ago