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3 years ago

Solve for the variable. 3x = -7 A. -4 B. -2.3 C. 2.3 D. 4

Mathematics

2 answers:

MariettaO [177]3 years ago

7 0

The correct answer is B.

Lapatulllka [165]3 years ago

5 0

Correct answer is B

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Joshua had two-sevenths of all the goals scored by is soccer team. His team scored 28 goals this past season. How many goals did

MAXImum [283]

Answer:

Rest of the team= 20 goals

Step-by-step explanation:

Giving the following information:

Joshua= (2/7)

His team scored 28 goals this past season.

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3 years ago

Simplify the expression (x^19 times y^21) divided by (x^2 times y^6)^2

Lyrx [107]

Answer:

$x^{15}.y^{9}$

Step-by-step explanation:

$\frac{x^{19} . y^{21}}{(x^2. y^6)^2} \\\\Here\,\, exponent\,\, rules\,\, will\,\, be\,\, used.\\First\,\, multiply\,\, power\,\, of \,\,2\,\, with\,\, denominator \,\,exponents\\\\\frac{x^{19} . y^{21}}{x^4. y^{12}}\\If \,\, same\,\, bases\,\, are\,\, divided\,\, then\,\, their\,\, exponents\,\, are \,\,subtracted\,\,\\\\x^{19-4}.y^{21-12}\\\\x^{15}.y^{9}$

3 0

3 years ago

Anna35 [415]

Answer:

$x = -1$ $and$ $x = -9$

Step-by-step explanation:

Once again, we have a problem with the |x| in it, so like last time, every number that is the outcome within those brackets, is positive.

Let us check:

A. x = 21 over 4 and x = -11 over 4

This one is a very simple to say no to, as we are talking about decimals (if you convert into decimals at this point), as in -16 there are no decimals.

False.

B. x = -1 and x = 9

-1 is correct. But 9 is not. Why? Here:

9 + 5 is 14

14 the multiplied by -4 does not equal -16

False.

C. x = -1 and x = -9

Like what I said before, -1 is correct, now in this answer, -9 is also correct.

Unlike the last one, this one is -9 + 5 which is -4, then since it is inside the positive brackets, the number 4 becomes positive.

4 * -4 = -16

True.

The last one is incorrect. You know why

;)

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3 years ago