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3 years ago

7y-12-3y+9=0 help please

Mathematics

2 answers:

spayn [35]3 years ago

5 0

Hope this helps u....!!!

nasty-shy [4]3 years ago

3 0

Simplify. Combine like terms

7y - 3y = 4y

-12 + 9 = -3

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4y - 3 = 0

Isolate the y. Note the equal sign. What you do to one side, you do to the other side. Do the opposite of PEMDAS.

4y - 3 (+3) = 0 (+3)

4y = 3

4y/4 = 3/4

y = 3/4

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y = 3/4 is your answer

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hope this helps

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What is the best estimate for the quotient 5,397 divided by 62

marysya [2.9K]

Answer:

The best estimate is 90.

Step-by-step explanation:

Given : Quotient 5,397 divided by 62 .

To find : The best estimate of the given situation.

Solution : We solve this by approximating the term and then divide to get solution.

Approximation is rounding off the number

→ When the ones digit is greater than 5 (5, 6, 7, 8, or 9) then it round the number up.

→ When the ones digit is less than 5 ( 0, 1, 2, 3, or 4) then it round the number down.

Approximation of 5397 to hundredth is 5400

Approximation of 62 to tenth is 60

Now, divide 5400 by 60

$\frac{5400}{60}= 90$

Therefore, The best estimate is 90.

We can also cross check by actual division of 5397 by 62.

$\frac{5397}{62}= 87.04$

When we approximate 87.04 it round off to 90.

4 0

3 years ago

Read 2 more answers

6 x 10 5 is how many times the value of 3 x 10 (Hint: Write your answer in standard form.)

JulijaS [17]

Answer:

0.000036

Explanation:

When multiplying a number by 10 to the power of a positive exponent (e.g.

), move the decimal in the number that many spaces to the right (e.g.

4.5

⋅

4500

When multiplying a number by 10 to the power of a negative exponent (e.g.

−

), move the decimal in the number (the absolute value of) that many spaces to the left (e.g.

4.5

⋅

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0.00045

For

3.6

⋅

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, move the decimal five spaces to the left:

0.000036

Step-by-step explanation:

5 0

3 years ago

What is the approximate age of a woman whose normal systolic pressure measures 125 mm Hg?

sashaice [31]

The approximate age of a woman whose normal systolic pressure measures 125 mm Hg is 31

The function is given as:

$P(A) = 0.006A^2 - 0.02A + 120$

When the normal systolic pressure is 125, it means that:

$P(A) = 125$

So, we have:

$125 = 0.006A^2 - 0.02A + 120$

Subtract 125 from both sides of the equation

$0= 0.006A^2 - 0.02A + 120 -125$

$0= 0.006A^2 - 0.02A - 5$

Rewrite the equation as:

$0.006A^2 - 0.02A - 5 = 0$

Using a graphing calculator, we have:

$A = \{30.58, -27.25\}$

But age cannot be negative.

So, we have:

$A = 30.58$

Approximate

$A =31$

Hence, the age of the woman is 31

Read more about quadratic functions at:

brainly.com/question/11441586

8 0

2 years ago

Read 2 more answers

What is the slope of the line that goes through -3,7 & -17,3

Natalka [10]

Point 1: (-3, 7)

Point 2: (-17, 3)

To find the slope, we need to use the slope formula which is as follows: m = (y2 - y1) / (x2 - x1). We will plug in each x and y coordinate from our points above, respectively.

m = (3 - 7) / (-17 - - 3)

m = (-4) / (-14)

m = 2/7

The slope of the line that goes through (-3, 7) and (-17, 3) is 2/7.

Hope this helps!! :)

7 0

3 years ago

I NEED HELP ASAP PLS WILL MARK BRINLIEST!!!

d1i1m1o1n [39]

Step-by-step explanation:

wait, I will look my lecture last year

5 0

2 years ago