All categories

2 years ago

Solve using Square Roots. 16x² - 34=15

Mathematics

1 answer:

CaHeK987 [17]2 years ago

4 0

Answer:

$\sqrt{\frac{49}{16}$

Step-by-step explanation:

You might be interested in

I need help please I have to finish this

4vir4ik [10]

Answer: x=4

Step-by-step explanation:

We know that line segment AC= AB + BC

we also know that AB= 3x+8 and BC= 2x-5

by substituting these, we get AC= (3x+8)+(2x-5)

AC is given as being 23, so we know that

23= (3x+8)+(2x-5)

by combining like terms, we get that

5x+3=23

simplify this to get that x=4

6 0

3 years ago

Please help If using the method of completing the square to solve the quadratic equation

Luba_88 [7]

I don’t know I suck at math sadly

4 0

3 years ago

7+4(r+3)=9r-6 show work pls AND HELP ASAP

ivanzaharov [21]

$\: \: \: \: \: \:$

$= \: \: \: \: r = 5$

Step-by-step explanation:

$7 + 4(r + 3) = 9r - 6$

distribute 4 through the parentheses

$7 + 4r + 12 = 9r - 6$

add numbers

$19 + 4r = 9r - 6$

move the variable to the left hand side and change its sign

$19 + 9r = - 6$

move the constant to the right hand side and change its sign

$4r - 9 = - 6 - 19$

collect like terms

 $- 5r = - 6 - 19$ 

calculate the difference

$- 5r = - 25$

divide both sides of the equation by -5

 $= \: \: \: \: r = 5$ 

<h2>hope it helps</h2>

7 0

2 years ago

Solve for x and y...............

sladkih [1.3K]

Answer:

9. $x=30, y=10\sqrt{3}$

11. $x=5\sqrt{3}, y=10\sqrt{3}$

Step-by-step explanation:

$\sin x=\dfrac{10}{20}\\x=\sin^{-1}\left( \dfrac{1}{2} \right)=30^{\circ}\\y=\sqrt{20^2-10^2}=\sqrt{400-100}=\sqrt{300}=10\sqrt{3}$

11)

$\tan 60= \dfrac{15}{x}\\x=\dfrac{15}{\tan 60}=5\sqrt{3}\\y=\sqrt{(5\sqrt{3})^2+15^2}=\sqrt{75+225}=\sqrt{300}=10\sqrt{3}$

Hope this helps!

7 0

3 years ago

Read 2 more answers

HELP plS! if sin 0=7/25, find cos0.

kodGreya [7K]

Hey there! :)

Answer:

csc θ = 25/7.

Step-by-step explanation:

Recall that csc, or cosecant, is the reciprocal of sine. Therefore:

If sin θ = 7/25:

Find the reciprocal:

7/25 --> 25/7.

csc θ = 25/7.

8 0

3 years ago

Read 2 more answers