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3 years ago

7

The base of the regular triangular pyramid has sides that are 14 cm with a height of 12.1 cm. The slant height of the pyramid is

12.1 cm. What is the surface area of the pyramid?

1 answer:

KatRina [158]3 years ago

6 0

Answer:ni

Step-by-step explanation:

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If you add a prime number to itself, is the<br>sum composite or prime? Explain your<br>reasoning

Igoryamba

The sum is composite because it is the same as multiplying the number by two.

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2 years ago

Which expression is equal to 75√ ?<br><br> 75√25<br><br> 355√<br><br> 75√5<br><br> 4935√

Viefleur [7K]

The expression that is equal is 72 or 4935

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2 years ago

Bianca earned $399.60 after working for 18.5 hours. How much did she earn for one hour?

Oxana [17]

Answer:

$21.6 in one hour

Step-by-step explanation:

to find one hour divide 399.60 into 18.5

8 0

3 years ago

Read 2 more answers

I need help asap please

rjkz [21]

Answer:

$x = -\frac{3}{2}$ or $x = 1$

Step-by-step explanation:

Using the zero product property, first step is to set the given equation, $2x^2 + x - 1 = 2$ , to zero. Then factorise the left side.

Thus,

$2x^2 + x - 1 = 2$

Subtract 2 from both sides

$2x^2 + x - 1 - 2 = 2 - 2$

$2x^2 + x - 3 = 0$

Factorise the left side

$2x^2 + 3x - 2x - 3 = 0$

$x(2x + 3) - 1(2x + 3) = 0$

$(x - 1)(2x + 3) = 0$

Find the solution

$x - 1 = 0$

Or

$2x + 3 = 0$

$x = 1$

Or

$2x + 3 = 0$

$2x = -3$

$x = -\frac{3}{2}$

The answer is: $x = 1$ or $x = -\frac{3}{2}$

3 0

3 years ago

A car travels the 120 miles from A to B at 60 miles per hour, and then returns to A on the same road. If the average rate of the

inessss [21]

Outbound Trip 120 miles 60 mph equals 2 hours

Return Trip 120 miles

Total Trip 240 miles at 45 mph average speed

Total time = distance / rate = 240 / 45 = 5.3333333333 Hours

The return trip of 120 miles takes (5.3333333333 Hours MINUS 2 hours)

Return Trip Speed = 120 / 3.333333333 = 36 miles per hour

5 0

3 years ago