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3 years ago

HELP ME PLEASE FOR 16 EASY POINTS solve for x 3x+6<21

2 answers:

8 0

Answer: x = 6

Explanation:
3* 5+ 6 = 21
So it is not greater than 21, it’s the same as 21
But,
3* 6= 18 + 6 = 24
And
24>21

love history [14]3 years ago

3 0

Answer:

x=5

Step-by-step explanation:

This one does not follow the correct rules in math but this is very helpful for "limited time" exams.

Transfer +6 to other side of the equation, converting the sign to opposite one making +6 to -6

−

Subtract

Divide it by the number with

Final answer

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3 years ago

A triangle has side lengths of (6.2p + 4.5q) meters, (3.4p – 0.7r) meters, and (2.9r – 4.1q) meters. Which expression represents

Natalija [7]

Answer:

9.6p + 0.4q + 2.2r meters (answer A)

Step-by-step explanation:

We sum up the three side lengths to obtain the perimeter of the triangle:

(6.2p + 4.5q) meters, , and (2.9r – 4.1q) meters

+ (3.4p – 0.7r) meters

+ (2.9r – 4.1q) meters

---------------------------------

9.6p + 0.4q + 2.2r meters (answer A)

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3 years ago

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4 years ago

The dimensions of two square pyramids formed of sand are shown. How much more sand is in the pyramid with the greater volume?

SSSSS [86.1K]

Answer:

The pyramid with the greater volume has 5in^3 more sand

Step-by-step explanation:

Given

Pyramid A

$B = 25in^2$ -- Base Area

$h = 9in$ --- height

Pyramid B

$B = 30in^2$

$h = 7in$

See attachment for pyramids

The volume of a square pyramid is:

$V = \frac{1}{3}Bh$

First, calculate the volume of pyramid A

$V_A = \frac{1}{3} * 25in^2 * 9in$

$V_A = 25in^2 * 3in$

$V_A = 75in^3$

Next, the volume of pyramid B

$V_B = \frac{1}{3} * 30in^2 * 7in$

$V_B = 10in^2 * 7in$

$V_B = 70in^3$

To calculate how much more sand the greater pyramid has, we simply calculate the absolute difference (d) between their volumes

$d = |V_B - V_A|$

$d = |70in^3 - 75in^3|$

$d = |- 5in^3|$

$d = 5in^3$

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3 years ago

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4 years ago