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3 years ago

I need this for a test

Mathematics

2 answers:

Brrunno [24]3 years ago

8 0

Answer: x = 16

Step-by-step explanation:

∛9 + x = 15

Divide both sides by 3

√9 + x = 5

The squareroot of 9 + x has to be 5

√9 + x² = 5²

9 + x = 25

Subtract both sides by 9

x = 16

Now we check if our answer is correct

∛9 + x = 15

∛9 + (16) = 15

∛25 = 15

3 × 5 = 15

15 = 15

Its correct!

Hope I helped!

Cerrena [4.2K]3 years ago

7 0

Answer:

x=16

Step-by-step explanation:

Remove the radical by raising each side to the index of the radical.

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A line contains the points (3, 8) and (6, 5). Write the equation of the line in slope-intercept form.

DedPeter [7]

You use the formula Y2-Y1
--------
X2-X1
8-5 3
----- = -- = -1 X=-1
3-6 -3

3 0

3 years ago

P,W,R & S form the vertices of a quadrilateral. PQR = 74 degrees

Zielflug [23.3K]

Answer:

∠ SPQ = 75°

Step-by-step explanation:

The sum of the 4 angles in a quadrilateral = 360°

Subtract the sum of the 3 angles from 360 for ∠ SPQ

∠ SPQ = 360° - (90 + 74 + 121)° = 360° - 285° = 75°

6 0

3 years ago

Read 2 more answers

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

3 years ago

Write two expressions where the solution is 28

Likurg_2 [28]

24 + 4 = 28
14 • 2 = 28
11 • 2.57 = about 28

Hope this helps a little!

8 0

3 years ago

Pls help me with an accurate answer I can’t seem to solve it. Tyy :)

castortr0y [4]

Answer:

.OPTION A:20°

SINCE THE BOTH SIDE OF LINE IS PERPENDICULAR

THEREFORE,90°

THEREFORE,

4X-10+X=90.

5X-10=90

5X=100

X=20°

7 0

3 years ago