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2 years ago

3×-7 equivalent expressions A. -21 B. 4 C. -4 D. 21

Mathematics

1 answer:

USPshnik [31]2 years ago

6 0

Answer:

-21

Step-by-step explanation:

3x7=21 and a negative x a positive is always negative

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There are 4 red marbles, 3 blue marbles, and 13 green marbles in a bag.

IRINA_888 [86]

Answer:

3/20+4/19= 137/380

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2 years ago

what is the length of the hypotenuse of a right triangle with legs that measure 8 and 13 cm round the answer to the nearest hund

atroni [7]

Use pythagoreaan theorem
a^2+b^2=c^2
a and b are teh legnth s of the legs
c is the legnt o fthe hyptonuse

8^2+13^2=c^2
64+169=c^2
233=c^2
square root both sdies
aprox 15.264=c

the legnth is aprox 15.26 cm

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2 years ago

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Give the values of a, b, and c needed to write the equation's general form.<br>1/4x^2+5=0

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Hi my lil bunny!

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Let's solve your equation step-by-step.

$\frac{1}{4} x^2+5=0$

For this equation: $a=0.25, b=0, c=5$

$0.25x^2 + 0x + 5 = 0$

Step 1: Use quadratic formula with $a=0.25, b=0, c=5.$

$x = \frac{-b ± \sqrt{b^2 - 4ac} }{2a}$

$x = \frac{-(0) ± \sqrt{(0)^2 -4 (0.25) (5) } }{2(0.25)}$

$x = \frac{0 ± \sqrt{-5} }{0.5}$

Answer : No Real Solutions.

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If this helped you, could you maybe give brainliest..?

Also Have a great day/night!

❀*May*❀

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3 years ago

A 2400 gallon pool is being filled at a rate of 40 gallons per minute. At this rate, how many minutes will it take to fill this

ira [324]

After 30 minutes the pool will be half full

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2 years ago

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The difference of a number times

Hunter-Best [27]

7 x - 5 = 8
7 x = 8 + 5
7 x = 13
x = 13/7

7 ( 13/7) - 5 = 8
91/7 - 35/7 = 56/7
56/7 = 56/7 = 8

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3 years ago