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3 years ago

Select the correct answers.

Mathematics

2 answers:

goldenfox [79]3 years ago

7 0

Answer:b

Step-by-step explanation:

insens350 [35]3 years ago

5 0

Answer:it is c

Step-by-step explanation:

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Can someone help me?

Wittaler [7]

Answer:

8 that is your answer

Step-by-step explanation:

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3 years ago

(6x + 5) - (x - 3) Polynomials

sasho [114]

Answer:

Step-by-step explanation:

THE TRICK HERE IS TO DISTRIBUTE THE MINUS SIGN TO THE SECOND TERM.

(6X+5)-(X-3)=

6X+5-X+3 (REMEMBER A NEGATIVE TIMES A NEGATIVE EQUALS A POSITIVE)

NOW COMBINE LIKE TERMS.

5X+8

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3 years ago

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Solve system of equation using elimination by addition.<br><br> Will give brainliest!!

DedPeter [7]

Answer:

$x = 2, y = -3$

Step-by-step explanation:

Add the 2 equations together, then solve for x.

$(2x + 2y) + (3x - 2y) = (-2) + (12)\\ 2x + 3x + 2y - 2y = -2 + 12\\5x = 10\\x = 2$

Now that we know the value of x, we can easily find y by substitution.

$3x - 2y = 12\\3(2) - 2y = 12\\6 - 2y = 12\\-2y = 6\\y = -3$

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2 years ago

Rashal is adding the expression below. Negative 3 + left-bracket (negative 7) + (negative 6) right-bracket First, he rewrites th

diamong [38]

I think it is 3 I think I’m not sure

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3 years ago

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Precal : Note: Triangle may not be drawn to scale. Suppose a = 3 and A = 15 degrees

drek231 [11]

Given:

In a right triangle at B,

$\begin{gathered} a=3 \\ A=15^{\circ} \end{gathered}$

To find:

The length of the sides b and c and angle B.

Explanation:

Using the trigonometric ratio,

$\begin{gathered} sinA=\frac{a}{c} \\ \sin15^{\circ}=\frac{3}{c} \\ c=\frac{3}{\sin15^{\circ}} \\ c=11.59 \\ c\approx11.6 \end{gathered}$

Using the trigonometric ratio,

$\begin{gathered} \tan A=\frac{a}{b} \\ \tan15^{\circ}=\frac{3}{b} \\ b=\frac{3}{\tan15^{\circ}} \\ b=11.19 \\ b\approx11.2 \end{gathered}$

Using the angle sum property,

The angle B becomes,

$\begin{gathered} 90+15+B=180 \\ B=180-90-15 \\ B=75^{\circ} \end{gathered}$

Final answer:

The values are,

$\begin{gathered} b=11.2 \\ c=11.6 \\ B=75^{\circ} \end{gathered}$

3 0

11 months ago