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3 years ago

Please look at the picture below

Mathematics

2 answers:

ELEN [110]3 years ago

6 0

6. A would be multiplied by 3 to get to 21 so you would also multiply B by 3 that leads you to get 6.
Hope this helps!!

astra-53 [7]3 years ago

3 0

Its 6, because if a = 7 originally n u times a by 3 u get 21. so if u times b which is originally 2, 2 times 3 is 6

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Solve this quadratic equation using the quadratic formula. x 2 + 8x - 5 = 0

nadezda [96]

x=−4+√21‌‌ or ‌‌x=−4−√21

4 0

4 years ago

Read 2 more answers

Question 2 Please

NeX [460]

Answer:

Step-by-step explanation:

Start by moving the 3 to the other side of the equals sign to get

$tan^2(2\theta)=3$

$tan^2(2\theta)=(tan(2\theta))(tan(2\theta))$ so with that replacement:

$(tan(2\theta))(tan(2\theta))=3$

By the Zero Product Property,

$tan(2\theta)=3$ or $tan(2\theta)=3$

Yes these are both the same, so we only need one of them. Once we find the angle, they are both the same, so we only need one of these equations.

$tan(2\theta)=3$ , take the inverse tangent of both sides to give you:

$2\theta=tan^{-1}(3)$ and

$2\theta=71.565$ so

$\theta=35.8$

Tangent increases in increments of pi or 180, so the other angle within the given interval is 35.8 + 180 = 215.8

6 0

3 years ago

What is the sum of the first ten non-zero multiples of twenty

EastWind [94]

1,2,4,5,10,20

42 is the answer to your question

7 0

3 years ago

Which is the multiple of 2 a. 75 b. 1,000 c. 2461 d. 847

WINSTONCH [101]

For a number to be a multiple of 2, it must be an even number.
An even number ends in 0, 2, 4, 6, or 8.

The only choice that satisfies this is B. 1,000.
The rest of the choices are odd numbers; thus, they are not multiples of 2.

I hope this helps! :)

8 0

3 years ago

Lines c and d are parallel. Parallel lines c and d are cut by transversals s and t. Clockwise from top left, the angles formed b

lys-0071 [83]

Answer:

Options (1), (2) and (5) are true.

Step-by-step explanation:

Option (1). m∠1 = (2x + 10)°

lines c and d are the parallel lines and t is a transverse.

Therefore, m∠1 = (2x + 10)° [corresponding angles]

This option is true.

Option (2). m∠3 = 87°

Since ∠3 and angle having measure equal to 87° are the vertical angles therefore, both the angles will be equal in measure.

This option is true.

Option (3). m∠2 = (2x + 10 + 5x - 1)°

m∠2 = (5x - 1)° [Since both the angles are interior alternate angles]

Therefore, this option is not true.

Option (4). m∠1 + m∠2 = m∠3

(5x - 1) + (2x + 10) + 87 = 180° [Sum of liner angles at a point is 180°]

7x + 96 = 180

7x = 180 - 96

x = $\frac{84}{7}$

x = 12

Therefore, m∠1 = (2x + 10) = 34°

m∠2 = (5x - 1) = 59°

m∠3 = 87°

For the given relation,

m∠1 + m∠2 = m∠3

34 + 59 = 87

93 = 87

Not true.

Therefore, this option is not correct.

Option (5). 87 + 2x + 10 + 5x - 1 = 180°

True.

Since these angles are the linear angles so the sum of all angles = 180°

Therefore, the given option is correct.

Options (1), (2) and (5) are the true.

4 0

3 years ago