MATHEMATICS MIDDLE SCHOOL

How do you simplify this expression ? 9•(7-4)^2+9

can you PLEASE show in words and explain your answer i need help!

Answers

Answer 1
Answer:

Answer:

90

Step-by-step explanation:

we have:

9*(7-4)^2+9

we subtract 7 and 4: 7-4

we have:

9*(3)^2+9

we know: 3^2=3*3=9

so we have:

9*9 +9

we multiply 9 by 9: 9*9 = 81, so we have:

81+9

90
Answer 2
Answer:

Answer:

\Huge \boxed{90}

Step-by-step explanation:

To solve this problem, first you have to use the order of operations stands for parenthesis, exponents, multiply, divide, add, and subtract numbers from left to right. Please Excuse My Dear Aunt Sally!

First, parenthesis.

(7-4)=3

9*3²+9

Next, exponent.

3²=3*3=9

9*9+9

Then, multiply numbers from left to right.

9*9=81

Add numbers from left to right.

81+9=90

Therefore, the correct answer is 90.

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What us the unit price of 32 ounces of yogurt that cost 4.79$

Answers

Do you mean the cost per ounce? 
Then that would be $0.1496, or rounded to the nearest cent, 15 cents a ounce.

What is the decimal .387123 rounded to the nearest thousand

Answers

0.387123

Note the place value of each digit

0
.
3 (tenths)
8 (hundredths)
7 (thousandths)
1 (ten thousandths)
2 (hundred thousandths)
3 (millionths)

to find the nearest thousandths, look at the place value of the ten thousandths. It is a 1. Because it is less than 5, you round down.

0.387123 becomes 0.387

0.387 is your answer

hope this helps
It is the nearest thousandth which is the third decimal place. The answer would be .387 unless the 1 was a 5 or higher then it would be .388

A rectangular pool is 20 feet wide and 50 feet long. A deck used for sunning surrounds the pool. The deck is the same width all the way around the pool. The total area of the deck is 456 square feet. How wide is the walkway?

Answers

deck=456
area of pool=legnth times width=20 times 50=1000

the area of the deck is made up of 4 rectangles and 4 squares, the rectangles' areas come in pairs
areas are
area of deck= 2(20w)+4(w^2)+2(50w)d

456=2(20w)+4(w^2)+2(50w)

distribute

456=40w+4w^2+100w

add like terms

456=4w^2+140w

divide everybody by 4

114=w^2+35w

subtract 114 from both sides

0=w^2+35w-114

find what 2 numbers multiply to get 114 and add to get 35 and factor

-3 and 38

0=(w-3)(w+38)

set each to zero

w-3=0

w=3


w+38=0

w=-38

false since measures in real life cannot be negative

therfor width of walkway=3ft

Answer: 3 feet

Step-by-step explanation: this basically sum up the verifed answer

PLEASE HELP ALMOST FINISHING ALBERA 1 PUT I NEED YOUR HELP PLEASE I BEG YOU BRAINLEST ANSWER!!!

Answers

59  is D 
because  with the point (-3,7) you substitute it into the equation, making it: 7=4x+b.  solve for b.  then you have y=4x+19.     work out the algebra in the possible choices and whatever equals y=4x+19 will be the answer. in this case, its D.


60 is C
same as above, you do the algebra of the equation. bring the one over after doing distribution with the 4 and voila!


61 is A
a relatively easy one, all you do is the the slope -4 where m goes, and 3 where b goes. y= -4x+3


62 is C.
this one requires more work.
chose one of the points, in this case (2,7) and put them into the equation. 
but wait, you need a slope! 
you get that use the formula (y2-y1)/(x2-x1) which will be
(7-5)/(2-3) which will be
-2.
now you have y-7= -2(x-2)
voila!



63 is  C.   y= 1/2x+3

64 is B. (3, -5)

66 is B. negative. the line  goes \ ( not / which is positive)

67 would be A. because it is positive and the I and the E are in the right places.


70 is C.  2/3.   as before, remember we can but the points into this equation and have (6-4)/(3-0) which = 2/3


71  is D.  y= 3x+10

72 is C. a third degree monomial

73 can't read


74 can't read 
 
75 can't read.

 

Enrique is measuring the mass of a flower petal. Which unit of measurement should he use to eliminate the need to write the value in scientific notation

Answers

Answer:

Grams

Step-by-step explanation:

cause you cute

Answer:

Jun 4, 2017 - Enrique is measuring the mass of a flower petal. Which unit of measurement should he use to eliminate the need to write value in scientific ...

Step-by-step explanation:

Word form of 53,200.4

Answers

The word form of 53,200.4 would be fifty-three thousand, two hundred and four tenths.

Now remember, to say a number in a decimal in word form, you must remember the names for each placement.

.1 the one would be in the tenths

.01 the one would be in the hundredths; and

.001 the one would be in the thousandths.
fifty three thousand two hundred and four
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