MATHEMATICS MIDDLE SCHOOL

Math help again all work

Answers

Answer 1

Answer:

Answer:

x > 6

Step-by-step explanation:

-5 > 19 - 3x + (-6)

Combine like terms.

-5 > 13 - 3x

Subtract 13 from both sides.

-18 > -3x

Divide both sides by -3.

6 < x

Flip this around. x > 6

Answer 2

Answer:

Answer:

Step-by-step explanation:

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Julie went to the post office and bought both 41-cent stamps and 26-cent postcards. She spent $51.40. The number of stamps was 20 more than twice the number of postcards. How many of each did she buy?stamps= ? postcards= ?

Answers

Stamps = 100, Postcards = 40

100 x 0.41 cents + 40 x 0.26 cents = $41 + $10.4 = $51.4

------ Solution-----

$0.41 x STAMPS + $0.26 x POSTCARDS = $51.4

1 STAMP = 20 + 2 x POSTCARDS

$0.41 x (20 + 2 x POSTCARDS) + $0.26 POSTCARDS = $51.4

POSTCARDS = 40

STAMPS = 20 + 2 x 40 = 100

Answer:

Julie bought 40 postcards and 100 stamps.

Step-by-step explanation:

Write the equation by adding the total values of each item.

0.41 (2p+20)+0.26p = 51.40

We can solve this equation for p to find the number of postcards.

0.41(2p+20)+0.26p =51.40

0.82p+8.20+0.26p=51.40

1.08p=43.2

p=40

So, the number of postcards she bought is 40. Since the number of 41-cent stamps is 20 more than twice the number of postcards, the number of 41-cent stamps is 2(40)+20=100.

Solve and show work! PLEASE HELP! I believe I have the right answer but I want to make sure

Answers

Answer:

t = 51

Step-by-step explanation:

Given

360 = 20 $√(t+273)$ ( divide both sides by 20 )

18 = $√(t+273)$ ( square both sides )

18² = t + 273, that is

t + 273 = 324 ( subtract 273 from both sides )

t = 51

Steve uses 8/9 gallon of paint to paint 4 identical bird houses. How many gallons of paint does he use for each birdhouse?

Answers

Answer:

0.22 gallons of paint steve uses for each birdhouse .

Step-by-step explanation:

As given

$Steve\ uses\ (8)/(9)\ gallon\ of\ paint\ to\ paint\ 4\ identical\ bird\ houses.$

$Paint\ used\ for\ each\ birdhouse = (Total\ Paint\ uses)/(Number\ of\ birdhouse)$

$Paint\ used\ for\ each\ birdhouse = ((8)/(9))/(4)$

$Paint\ used\ for\ each\ birdhouse =(8)/(9* 4)$

$Paint\ used\ for\ each\ birdhouse =(2)/(9)$

= 0.22 gallons

Therefore the 0.22 gallons of paint steve uses for each birdhouse .

2/9 of a gallon of paint is used per bird house.

How can you use what you know about place value to find what marks score could be?

Answers

4 or less give it a rest 5 or more raise the score

Which of the following is equivalent to (5 /k) + ((k + 3) /(k + 5)) ?A. (k +8) /(2k + 5)
B. (k + 8) /k(k + 5)
C. 5(k + 3) /k(k + 5)
E. (k^2+ 8k + 25) /k(k + 5)

Answers

$(5)/(k)+(k+3)/(k+5)=(5(k+5))/(k(k+5))+(k(k+3))/(k(k+5))=(5k+25+k^2+3k)/(k(k+5))=(k^2+8k+25)/(k(k+5))\n\nAnswer:E$

Answer:

E is the answer.

Step-by-step explanation:

Jenny filled 12 pitchers with equal amount of lemonade in each. The total amount of lemonade in the 12 pitchers was 41.4 liters. How many liters of lemonade would be in 7 pitchers

Answers

Answer:

24.15 liters of lemonade would be in 7 pitchers.

Step-by-step explanation:

The total amount of lemonade was 41.4 liters.

Jenny filled 12 pitchers with equal amount of lemonade in each.

So dividing total amount of lemonade by number of pitchers will yield amount of lemonade in each pitcher.

Hence,

$\text{Amount of lemonade in each pitcher}=\frac{\text{Total lemonade}}{\text{Number of pitchers}}$

$=(41.4)/(12)$

$=3.45\ lit$

Then the amount of lemonade in 7 pitchers will be,

$=3.45* 7=24.15\ lit$

24.15 liters of lemonade would be in 7 pitchers

Further explanation

Comparison is an effort to compare two or more objects in terms of shape or size, or number

Proportional Comparisons / Directly proportional are comparisons of two or more numbers where one number increases, the other numbers also increase at the same rate

Can be formulated

$\displaystyle \frac {x1} {y1} = \frac {x2} {y2}$

so that if:

x = 2

then

$\displaystyle y ={ \frac {y} {x} * \: 2}$

While the reversal value comparison / inversely proportional is the comparison of two or more numbers where one number increases, the other number decreases in value

or when one value decreases at the same rate that the other increases

Can be formulated

$\displaystyle \frac {x1} {y2} = \frac {x2} {y1}$