3 years ago

SUPER EASY

Mathematics

2 answers:

nirvana33 [79]3 years ago

7 0

The answer is the third one and which is letter C and it’s 3(x + 5) = 3 • x + 3 • 5

goblinko [34]3 years ago

6 0

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13. Don is running a race. He knows he can run 60 feet in 4 seconds. If he maintains this rate, how many miles will he run in 1

Lana71 [14]

Answer:

10.23 miles

Step-by-step explanation:

1 hour = 3600 seconds

$\frac{60}{4} =\frac{x}{3600} \\\\4x=216000\\x=54000$

54000 ft = 10.23 miles

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2 years ago

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A rectangle has a height of 2 + 4 and a width of zº + 3x + 2.

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Answer:

Step-by-step explanation:

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Isaac downloaded 7 ringtones. Each polyphonic ringtone costs $3.25, and each standard ringtone costs $1.50. If he spends a total

anzhelika [568]

Answer:

$6\ polyphonic\ ringtones$ and $1\ standard\ ringtone$

Step-by-step explanation:

Let

x -----> the number of polyphonic ringtones

y ----> the number of standard ringtones

we know that

$x+y=7$

$x=7-y$ -----> equation A

$3.25x+1.50y=21$ -----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B and solve for y

$3.25(7-y)+1.50y=21$

$22.75-3.25y+1.50y=21$

$3.25y-1.50y=22.75-21$

$1.75y=1.75$

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$x=7-1=6\ polyphonic\ ringtones$

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2 years ago

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What number must you add to complete the square x2 + 12x = -3

Serga [27]

<span>What number must you add to complete the square x^2 + 12x = -3?</span>

Make sure to always check your answers, by the way!

The answer is: (x + 6)² - 33

Hope I helped!

Let me know if you need anything else!

~ Zoe

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Is 1:2:3 equivalent to 2:4:6

Finger [1]

Answer:

Yes it is.

Step-by-step explanation:

Just multiply everything by 2.

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