4 years ago

Lesson 10 helpppppp pleaseeeeeeeee

Mathematics

1 answer:

Irina-Kira [14]4 years ago

7 0

#7 is VTU AND HFG
#8 is AAS

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Svetlana hair is 4 centimeters long. Her hair grows 1.5 cm per month. Svetlana wants her hair to grow so at least 7 cm long. Wri

Andrei [34K]

Let "per month" = m

The inequality is

1.5m + 4 ≥ 7

+ 4: Her hair right now is 4 cm long

1.5m: Her hair grows 1.5 per month (m)

≥ 7: She wants it to be at least 7 or more.

1.5m + 4 ≥ 7 is your answer

hope this helps

3 0

3 years ago

Solve each equation for 0≤x≤360<br> cos(x+45°)+cos(x-45°)= √2

andreev551 [17]

Answer:

0°

360°

Step-by-step explanation:

We want to solve the equation,

$\cos(x + 45) + \cos(x - 45) = \sqrt{2}$

We expand using trigonometric identities to get;

$\cos(x) \cos( 45) - \sin(x) \sin(45) + \cos(x) \cos( 45) + \sin(x) \sin(45) = \sqrt{2}$

$\frac{ \sqrt{2} }{2} \cos(x) - \frac{ \sqrt{2} }{2} \sin(x) + \frac{ \sqrt{2} }{2} \cos(x) + \frac{ \sqrt{2} }{2} \sin(x) = \sqrt{2}$

Simplify;

$\cos(x) - \sin(x) + \cos(x) + \sin(x) = 2$

Simplify;

$\cos(x) + \cos(x) = 2$

Add

$2\cos(x) = 2$

Divide by 2

$\cos(x) = 1$

Take cosine inverse;

In the

$x = \cos^{ - 1} ( 1) =0\degree$

Also in the 3rd quadrant cosine ratio is positive.

$x = 360-0= 360 \degree$

7 0

3 years ago

Which of the following is equivalent to 5 sqrt 13^3 ? A)13^2.

eimsori [14]

D) 13^(3/5)
This is assuming that the question is asking the √13^3. With the five as the yroot.

3 0

3 years ago

Read 2 more answers

Someone please help on this one?? :(

zaharov [31]

Answer:

C F(x) = -(x+4)^3

Step-by-step explanation:

When we reflect across the x axis, the equation becomes - f(x)

so (x+4)^3 becomes -(x+4)^3

5 0

4 years ago

What is equivalent to

lakkis [162]

equal or almost equal

i think

3 0

3 years ago