3 years ago

What is the LCM of 5, 20, 30, and 35?

Mathematics

1 answer:

Vaselesa [24]3 years ago

8 0

The LCM of 5,20,30,& 35 is 140

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given the equations 9x + (3)/(4)y + 6 and 2x + (1)/(2)y=9 by what factor would you multiply the sencond equation to eliminate y

Paul [167]

Answer:

-3/2

Step-by-step explanation:

If the first equation is 9x +3/4y = 6, then the solution would look like this:

$\left(9x+\dfrac{3}{4}y\right)-\dfrac{3}{2}\left(2x+\dfrac{1}{2}y\right)=(6)-\dfrac{3}{2}(9)\\\\6x=-\dfrac{15}{2}\\\\x=-\dfrac{15}{12}=-\dfrac{5}{4}\\\\2\left(-\dfrac{5}{4}\right)+\dfrac{1}{2}y=9\ \longrightarrow\ y=2\left(9+\dfrac{5}{2}\right)=23$

An appropriate multiplier is -3/2.

4 0

4 years ago

What is the best estimate for 1/2 percent of 385?

ddd [48]

1.925 or about 2

is the answer

6 0

3 years ago

What number must be added to the expression below to complete the square? x²-7x

Inessa [10]

Answer:

D. 49/4

Step-by-step explanation:

Complete the square by squaring half the coefficent of the x term

(-7/2)² = 49/4

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3 years ago

Vehicle A averages 14 miles per gallon of gasoline, and vehicle B averages 36 miles per gallon of gasoline. At these rates, how

Natali5045456 [20]

Answer:

vehicle a needs 72 gallons

while vehicle b needs 28

with this the equation is simpaly 72-28 which is 44

so vehicle a needs 44 more gallons of gas for da trip

Step-by-step explanation:

7 0

4 years ago

13. NBT.4

slava [35]

B 0.05 since the thousandth digit is higher than 5, it needs to be rounded up.

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4 years ago