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3 years ago

11

What is the value of this expression?

1 answer:

Eddi Din [679]3 years ago

5 0

Answer:

Step-by-step explanation:

(23 - 3) + (6 * 9) =

20 + 54 =

74 <===

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What equation results when you cross - multiply 17/d = 51/21

nekit [7.7K]

Answer:

$51d=357\\\\d=\frac{357}{51} \\\\d=7$

Step-by-step explanation:

A proportion is an equation that defines that two ratios are equal. When the terms of a proportion are cross multiplied, the cross products are equal. Cross multiplication is the multiplication of the numerator of the first ratio by the denominator of the second ratio and the multiplication of the denominator of the first ratio by the numerator of the second ratio:

$\frac{a}{b} =\frac{c}{d} \rightarrow ad=bc$

Therefore:

$\frac{17}{d} =\frac{51}{21} \\\\17*21=d*51\\\\357=51d\\\\Solving\hspace{3} for\hspace{3} d\\\\d=\frac{357}{51} \\\\d=7$

6 0

3 years ago

A school makes $715 from ticket sales for a school play. From the ticket sale, $448 is from adult tickets. Student tickets are $

Dahasolnce [82]

715=448+(3x)
715-448=3x
267=3x
267/3=x
89=x
89 students

8 0

3 years ago

Which expression uses the associative property to make it easier to evaluate

mash [69]

Answer:

C

Step-by-step explanation:

3 0

3 years ago

Solve:<br> 10 -0.75x < 7<br> Please and thank you

Anastaziya [24]

Answer:

The answer is x<4

But the girl over me just did it for points

5 0

3 years ago

Read 2 more answers

Please help ASAP!

Nina [5.8K]

It is given in the question that

$2(2x-1)>6 \ or \ x+3 \leq -6$

For th first inequality, we divide both sides by 2, and for second, we subtract 3 to both sides, that is

$2x-1>3 \ or \ x \leq -6-3
\\
2x>4 \ or \ x \leq -9
\\
x>2 \ or \ x \leq -9$

So the required inequality is

$(- \infty, -9] U (2, \infty)$

Correct option is B

7 0

3 years ago