3 years ago

Least common denominator of 1/70 and 3/20 .

Mathematics

1 answer:

miss Akunina [59]3 years ago

8 0

Answer: the least common denominator is 140

Step-by-step explanation: brainlest please

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The area of a rectangular classroom is given by the trinomial a - 4a - 21. The length of the rectangle is a+3. What is the expre

djverab [1.8K]

I am assuming you wrote the problem wrong. Is it a^2?
A^2 -4A-21=0
(A-7)(A+3)=0
A=7 A=-3, ignore the negative number because it doesn't make sense if you plug in for a.
length=a+3=7+3=10
Width=7=a

3 0

3 years ago

1+1? Will give brainliest to first correct answer.

d1i1m1o1n [39]

Answer:

1+1= 2

have a nice day stay safe

3 0

2 years ago

Read 2 more answers

Allison and Megan were at track practice. The track is 3/8 kilometers around.

Ad libitum [116K]

Allison ran 3/8 km (0.375 km) in 3 minutes.

Set up a proportion to find how long it takes for her to run 1 km

$\frac{0.375\textrm{km}}{3 \textrm{min}} = \frac{1\textrm{km}}{x \textrm{min}}$

Cross multiply to get:

$3 = 0.375x$

Solve:

$x = \frac{3}{0.375}$

x = 8 minutes

5 0

2 years ago

Pears cost $0.92 per pound and apples cost $1.10 per pound. mr.Bonilla bought 3.75 pounds of pairs and 2.1 pounds of apples how

eimsori [14]

Answer:

$5.76

Step-by-step explanation:

Total price for 3.75 pounds of pears:

$0.92(3.75) = $3.45$

Total price for 2.10 pounds of pears:

$1.10(2.10) = $2.31$

Total Price:

$$2.31 + $3.45 = $5.76$

4 0

3 years ago

A standard deck of playing cards has 52 cards total that contains 13 of each suit (hearts, diamonds, clubs and spades). What is

schepotkina [342]

Answer:

C 1/2

Step-by-step explanation:

There are 4 suits, 2 suits are red (hearts and diamonds) while 2 are black (clubs and spades)

Since 13 cards are in each suit, 26 cards are red ( 2 * 13)

There are 52 total cards

P (red) = red cards/ total cards

= 26 / 52

= 1/2

8 0

3 years ago