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3 years ago

Whats is a 3 step problem that can represent the expression 3x + (-5) = 19

Mathematics

1 answer:

GrogVix [38]3 years ago

3 0

Answer:

$x=8$

Step-by-step explanation:

$3x-5=19\\$

The first step is to add -5 to both sides:

$(3x-5)+5=19+5\\3x=24$

The next step is to divide 3 on both sides:

$\frac{3x}{3} =\frac{24}{3}$

$x=8$

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Three consecutive integers have a sum of 72 . Find the integers.

ANTONII [103]

Answer:

23, 24 and 25

Step-by-step explanation:

These are consecutive numbers that add up to 72.

6 0

3 years ago

2x + 3 + 4x + 6 + 12x + 18 = 477<br><br> Please answer with solving steps. Thanks guys :)

dybincka [34]

Answer:

x= 25

Step-by-step explanation:

2x + 3 + 4x + 6 + 12x + 18 = 477

FIRST combine like terms

take all "x"

2+4+12= 18x

take all whole numbers

3+6+18= 27

18x+27= 477

now solve for x

-27 on both sides

18x= 450

÷18 on both sides

x= 25

3 0

3 years ago

Read 2 more answers

I need to rewrite d and h without the use of fractional or negative exponents by using radicals, how I do that???

jolli1 [7]

Answer:

The pencil marks on your page show you exactly how to do that.

Step-by-step explanation:

Take advantage of two rules of exponents:

$\sqrt[n]{x}=x^{\frac{1}{n}}\\\\x^{-n}=\dfrac{1}{x^{n}}$

$(d)\quad x^{\frac{-1}{5}}=\dfrac{1}{x^{\frac{1}{5}}}=\dfrac{1}{\sqrt[5]{x}}\\\\(h)\quad x^{\frac{-2}{11}}=\dfrac{1}{x^{\frac{2}{11}}}=\dfrac{1}{\sqrt[11]{x^{2}}}$

3 0

3 years ago

Read 2 more answers

Over the past several years, the proportion of one-person households has been increasing. The Census Bureau would like to test t

Ganezh [65]

Answer: z =2.39

Step-by-step explanation:

Given :

$H_0: p \leq0.23\\\\ H_a: p > 0.23$

A random sample of 136 households found that 43 consisted of one person.

i.e. Sample size : n= 136

Sample proportion : $\hat{p}=\dfrac{43}{136}=0.316176470588\approx0.3162$

Test statistic for proportion :-

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

$\Rightarrow z=\dfrac{0.3162-0.23}{\sqrt{\dfrac{0.23(1-0.23)}{136}}}\\\\\Rightarrow\ z=\dfrac{0.0862}{\sqrt{0.00130220588235}}\\\\\Rightarrow\ z=\dfrac{0.0862}{0.0360860898734}\\\\=2.38873206552\approx2.39$

Hence, the value of the test statistic: z =2.39

5 0

3 years ago

Solve for BC and round your answer to the nearest hundredth

Tasya [4]

You gotta round the be to 100,000

6 0

3 years ago