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3 years ago

Solve -4x^2 + 6x - 10 = 0 using the quadratic formula. Show each step.

Mathematics

1 answer:

Musya8 [376]3 years ago

5 0

-12x-10=0 since the X can't combine with non X numbers

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Calculate the area of the regular pentagon below:

Anna [14]

Answer:

1064.8 in^2

Step-by-step explanation:

12.1 x 17. 6 / 2 to find one half of a triangle will equal 106.48

there are 10 triangle therefore 106.48 x 10 = 1064.8

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2 years ago

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Match with the appropiate property:

Nonamiya [84]

Answer:

distributive property of multiplication over addition

Step-by-step explanation:

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6 0

3 years ago

Please Answer These!

maxonik [38]

79.30 ---- 100%
The while store is discounted by 12% So subract 12 from 100

100-12 = 98

We have to figure out what 88% is

79.30 ---- 100%
X ------------ 88%

Cross Multiply

79.3× 88 = 100x

6978.4 = 100X

69.784 is without taxes

69.784 = 100% {100% because it is the total price.}

69.784 = 100%
X --------- 6.25%

Cross Multiply

69.784 × 6.25 = 100X
436.15 = 100 X
X = 4.3615

69.784 + 4.3615
74.15 is the answer

5 0

3 years ago

What is the value of the x in this equation. 7x = 14

S_A_V [24]

Answer:

Step-by-step explanation:

7x=14

$\frac{7x}{7} = \frac{14}{7}$

x=2

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7 0

2 years ago

An astronaut on the moon throws a baseball upward. The astronaut is 6 ft 6 in tall, and the initial velocity of the ball is 40 f

weqwewe [10]

Answer:

t = 0.293 s and 14.52 s

Step-by-step explanation:

The heights of the ball in feet is given by the equation as follows :

$S = -2.7t^2+40t+6.5$

Where t is the number of seconds after the ball was thrown.

We need to find is the ball 18 ft above the moon's surface.

Put S = 18 ft

$-2.7t^2+40t+6.5=18\\\\-2.7t^2+40t=18-6.5\\\\-2.7t^2+40t-11.5=0$

It is a quadratic equation. Its solution is given by :

$t=\dfrac{-40+\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)},\dfrac{-40-\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)}\\\\t=0.293\ s,14.52\ s$

So, the ball is at first 0.293 s and then 14.52 s above the Moon's surface.

8 0

2 years ago