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3 years ago

5

How do you access the math tutor on Brainly for free? Sometimes it says it costs money and then a couple weeks later it's free a

gain. How do I make it become free whenever it tries to charge?
I'm on Android phone.

1 answer:

Vilka [71]3 years ago

3 0

Just answer some questions

You might be interested in

Determine whether the vectors u and v are parallel, orthogonal, or neither.

kodGreya [7K]

<h3>Answer: orthogonal </h3>

===========================================================

Explanation:

For any two vectors defined as follows

u = <a,b>

v = <c,d>

the dot product is computed by

u dot v = a*c + b*d

If the dot product of the vectors is 0, then the vectors are orthogonal. Meaning they are perpendicular to one another.

-------------------

Let's find the dot product of these two given vectors

u = < 2, -4 >

v = < 6, 3 >

u dot v = 2*6 + (-4)*3

u dot v = 12 - 12

u dot v = 0

Therefore, these two vectors form a right angle and are <u>orthogonal</u>

-------------------

Extra info:

If we can show that u = <a, b> and v = <ka, kb> for some real number k, then we have shown that vectors u and v are parallel.

6 0

3 years ago

katrin [286]

Answer: (-2, -2)

Step-by-step explanation:

We will graph the equations. Then, we will decide which of the points is a solution. See attached for the graph. The point of intersection is the solution. This means the only solution is,

(2, 2)

4 0

3 years ago

Write the standard form for 25

pishuonlain [190]

Answer:

twenty fifth

Step-by-step explanation:

3 0

3 years ago

To work out the area in m² of material required for a pair of curtains, a seamstress squares the height of the window in m and a

Kisachek [45]

Answer:

a. Area = 1.94m²

b. Area = (p² + 0.5)m²

c. Height = 1.5m

Step-by-step explanation:

Given

<em>Let H represents Height and A represents Area</em>

<em>From the first and second statements, we have that:</em>

<em></em> $A = H^2 + 0.5$ <em></em>

<em></em>

<em>a. Calculating Area When Height = 1.2</em>

<em></em> $A = H^2 + 0.5$ <em></em>

<em>Substitute 1.2 for H</em>

<em></em> $A = 1.2^2 + 0.5$ <em></em>

<em></em> $A = 1.44 + 0.5$ <em></em>

<em></em> $A = 1.94$ <em></em>

<em></em>

Hence, the area is 1.94m²

<em></em>

<em>b. Calculating Area When Height = p</em>

<em></em> $A = H^2 + 0.5$ <em></em>

<em>Substitute p for H</em>

<em></em> $A = p^2 + 0.5$ <em></em>

<em></em>

Hence, the area is (p² + 0.5)m²

<em></em>

c. <em>Calculating Height When Area = 2.75m</em>²

<em></em> $A = H^2 + 0.5$ <em></em>

<em>Substitute 2.75 for A</em>

<em></em> $2.75 = H^2 + 0.5$ <em></em>

<em>Subtract 0.5 from both sides</em>

<em></em> $2.75 - 0.5 = H^2 + 0.5 - 0.5$ <em></em>

<em></em> $2.75 - 0.5 = H^2$ <em></em>

<em></em> $2.25 = H^2$ <em></em>

<em></em>

<em>Take Square Root of both sides</em>

<em></em> $\sqrt{2.25} = \sqrt{H^2}$ <em></em>

<em></em> $\sqrt{2.25} = H$ <em></em>

<em></em> $1.5 = H$ <em></em>

<em></em> $H = 1.5$ <em></em>

<em></em>

Hence, the height is 1.5m

5 0

3 years ago

how much cardboard would you need to construct a rectangular prism shaped box measuring 15 inches by 13 inches by 7 inches

givi [52]

We know that

[surface area]=2*[area of the base]+[perimeter of the base]*height

area of the base=15*13----> 195 in²

perimeter of the base=2*[15+13]----> 56 in
height=7 in
so
[surface area]=2*[195]+[56]*7-----> 782 in²

the answer is
782 in²

6 0

3 years ago