MATHEMATICS MIDDLE SCHOOL

The sum of 4 multiplied by a and 5 multiplied by b

Write in algebraic expression

Answers

Answer 1
Answer: 4a+5b is your answer
Answer 2
Answer: 4x5axb is the algebraic expression

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Copy each statement. Insert +,-,x, or ÷ symbols to make this statement true. 33-3-2-5=1
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A spinner has three sections. The table shows the results of spinning the arrow on the spinner 80 times. Three column table. First column values are Section 1 and 20. Second column values are Section 2 and 36. Third column values are Section 3 and 24. What is the experimental probability of the arrow stopping over Section 2? A. B. C. D.

What are the first few digits of pi

Answers

The first few digits of pi are:
3.141592654

pi has been calculated to hundreds of decimal places.  Commonly seen abbreviations are 3.14, 3.14159.

Simplify negative three fifths times m times quantity negative two sevenths times m minus one fourth end quantity.6 over 35 times m squared plus 3 over 20 times m
negative 6 over 35 times m squared minus 3 over 20 times m
6 over 35 times m squared plus one fourth
negative 6 over 35 times m squared plus 3 over 20 times m

Answers

Answer: ITS C 6/35 M^2 + 1/4

Step-by-step explanation: SO THIS IS THE ANSWER

Answer:

C. 6 over 35 times m squared plus one fourth

Step-by-step explanation:

There are approximately 7.5x10^18 grains of sand on earth.There are approximately 7x10 ^27 atoms in an average human body.Are there more grains of sand on earth or atoms in an average human body ?How do you know?

Answers

Answer:

Step-by-step explanation:

There are approximately 7.5 × 10¹⁸ grains of sand on earth.

There are approximately 7 × 10²⁷ atoms in an average human body.

A. There are more atoms in an average human body. When comparing the order of magnitude of each number 27 it greater than 18.

7 × 10²⁷ > 7.5 × 10¹⁸

B.  Now we will calculate how many times more atoms are in a human body compared to grains of sand on earth.

(7* 10^(27))/(7.5* 10^(18))

= (7)/(7.5)* (10^(27))/(10^(18))

≈ 1 × 10²⁷⁻¹⁸

≈ 1 × 10⁹

≈ 10⁹

There are approximately 1,000,000,000 atoms more in a human body compared to the grains of sand on earth.
There are more atoms in a human body because 7.5*10^18 is less than 7*10^27.

Charlie runs at a speed of 3 yards per second.about how many miles does Charlie run

Answers

I think since he runs 3 yards per hour per second their are 60 seconds in a minute so 60 times  equals 180 yards per second

What is -9x-(2x/-3) When x equals 7

Answers

-9x- (2x)/(-3)

-9*(7) - (2*7)/(-3)

9*7 = 63

(2*7)/(-3) = (14)/(-3)

Apply the fraction  rule : (a)/(-b) = - (a)/(b)

= - (14)/(3)

-63-( -(14)/(3) )

Apply rule  - ( - a) = a

-63+ (14)/(3)

Convert  element to fraction :

63 = (63)/(1)

-(63)/(1) + (14)/(3)

Find the LCD 1*3 = 3

- (63*3)/(3)+ (14)/(3)

(-3+63+14)/(3) = (-175)/(3)

Apply the fraction  rule : (a)/(-b) = - (a)/(b)

= - (175)/(3)

hope this helps!

Please solve these coin problems:1) James bought 80 postage stamps for which he paid $18.40. Some were 1 cent stamps and some were 33 cent stamps.how many of each kind did he buy?

  2) a postal clerk sold 75 stamps for $19.90. Some were 20 cent and some were 34 cent stamps. How many of each kind did he sell?

Answers

1)
Solving from system of equations:
x- amount of 1 cent stamps
y- amount of 33 cent stamps
\left \{ {{1*x+33*y=18,40} \atop {x+y=80}} \right.\nx=80-y\n0,01*(80-y)+0,33y=18,40\n0,8-0,01y+0,33y=18,40\n0,32y=18,40-0,8\n0,32y=17,60 /:0,32\ny=55\nx=80-55=25
2)
x- amount of 20 cent stamops
y-amount of 34 cent stamps
From system of equations:
\left \{ {{0,2x+0,34y=19,90} \atop {x+y=75}} \right.\nx=75-y\n0,2(75-y)+0,34y=19,90\n 15-0,2y+0 ,34y=19,90\n-0,2y+0,34y=19,90-15\n0,14y=4,90/:0,14\n y=35\nx=75-35=40
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