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3 years ago

Which expression represents the phrase "twice the sum of a number and three"?

Mathematics

2 answers:

Karo-lina-s [1.5K]3 years ago

5 0

2(n+3)
"sum of" is the clue meaning whatever follows those words should be set off alone in parenthesis

exis [7]3 years ago

3 0

2(n+3)
two times the sum of a number (n) and 3

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Find the answer pleaseeee... -15/9 + 9/4 = ? Please find what the question mark is

SVEN [57.7K]

Answer:

7/12

Step-by-step explanation:

-15/9+9/4

We need to make them have the same denominator:

9x4= 36 so that is our new denominator

-15x4= -60

9x9=81

(Sorry if i dont make sense)

Now we have -60/36+81/36 which is equal to 21/36.

Now we simplify:

21/36=7/12

3 0

3 years ago

4.2 x 106 – 1.2 x 105 - 2.5 x 105 Write in scientific notation

Alik [6]

Answer:

$3.83$ × $10^6$

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3 years ago

True or False?

neonofarm [45]

$FALSE!\\The\ segments\ below\ couldn't\ form\ a\ triangle.\\\\a,b,c-lengths\ sides\ of\ a\ triangle,\ then:\\\\a+b > c\\a+c > b\\b+c > c\\\\Here:a=9;\ b=4;\ c=15\\\\a+b=9+4=13 < 15!!!!$

7 0

3 years ago

Please helppppp I need help

a_sh-v [17]

Answer:

non proportional

Step-by-step explanation:

All of the others are correct

4 0

2 years ago

Onna received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.09 per pound. After buying the

mario62 [17]

Answer:

She bought 5 pounds

Step-by-step explanation:

Original worth of gift card = $80

Balance on card after purchase = $39.55

Amount used for purchase = 80 - 39.55 = $40.45

Next let us determine how many pounds of coffee she bought as follows:

Price of coffee = $8.09 per pound

amount spent on coffee = $40.45

Lett the number of pounds of coffee she bought be x

$ 8.09 = 1 pound

$40.45 = x pounds

since $8.09 = 1 pound

$\$\ 1 = \frac{1}{8.09}\ pounds$

$\$\ 40.45 = 40.45 \times\ \frac{1}{8.09} \\= \frac{40.45}{8.09}\\ = 5\ pounds$

5 0

3 years ago