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2 years ago

Which choice is equivalent to the expression below? square root of -64

Mathematics

2 answers:

Anna [14]2 years ago

8 0

Step-by-step explanation:

$\sqrt{ - 64 } = - 8$

so the answer you got pls mark branlist

trapecia [35]2 years ago

3 0

You cannot take square root of a Negative number. No perfect square is negative.

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factorise completely (x plus 2) Square - (x - 4) Square and hence find then value of 1000 Square minus 992 Square

tekilochka [14]

Answer:

$x^2+3x+8$

$15936$

Step-by-step explanation:

$\left(x+2\right)^2-\left(x-4\right)$

$\left(x+2\right)\left(x+2\right)-\left(x-4\right)$

$x^2+2x+2x+4-(x-4)$

$x^2+4x+4-\left(x-4\right)$

$x^2+4x+4-x+4$

$x^2+3x+8$

$1000^2-992^2$

$1000000-984064$

$15936$

3 0

3 years ago

Andy cut rope for an activity at outdoor camp. He had 504 centimeters of rope to cut into equal-length pieces. How many of the w

mina [271]

Answer: B, C, E

Step-by-step explanation:

For us to know if the options are correct, we just have to multiply the length the rope was cut into by the number of pieces and check if it equals 504 centimeter.

A. 12 pieces of 42.3 centimeter long rope.

= 12 × 42.3

= 507.6

This is wrong

B. 15 pieces of 33.6 centimeter long rope

= 15 × 33.6

= 504cm

This is correct

C. 16 pieces of 31.5 centimeter long rope

= 16 × 31.5

= 504cm

This is correct

D. 20 pieces of 25 centimeter long rope

= 20 × 25

= 500cm

This is incorrect

E. 35 pieces of 14.4 centimeter long rope

= 35 × 14.4

= 504cm

This is correct

Therefore, the correct option are B, C and E.

4 0

3 years ago

Express 5% as a decimal

IRINA_888 [86]

Answer:

.05

Step-by-step explanation:

you divide 5 by 100 which makes it .05

6 0

3 years ago

Corinne bought 5 bags of chips and 4 jars of dipping sauce for $21.82. At the same prices, Ginger bought 4 bags of chips and 3 j

AURORKA [14]

Step-by-step explanation:

5 bags of chips and 4 jars of dipping sauce cost $21.82. Also, 4 bags of chips and 3 jars of dipping sauce cost $16.86.

This problem can be modeled using linear equations in two variables.

Let $c$ be the cost of a bag of chip and $s$ be the cost of a jar of dipping sauce.

The information yields the equations

$5c+4s=21.82,4c+3s=16.86\\\textrm{Multiply first equation by 4 and second equation by 5}\\20c+16s=87.28,20c+15s=84.3\\\textrm{Subtracting second equation from the first one}\\s=\$2.98$

∴ A jar of dipping sauce costs $\$2.98$ .

3 0

3 years ago

A certain store sells small, medium and large toy trucks in each of the colors red blue green and yellow. the store has an equal

tangare [24]

There is a 1/2 chance that he will get at least one of the two features.

There are 3 x 4 = 12 possibilities. There are all 4 colors of each 3 sizes.

All 4 of the medium trucks have one of the features.

For the other 2 sizes, only the red truck will have one of the features.

There are 4 + 2 = 6 possibilities out of 12 for a chance of 6/12 or 1/2.

3 0

4 years ago

Read 2 more answers