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3 years ago

Ray made an error while solving the following equation. In which step did ray make an error?

Mathematics

2 answers:

raketka [301]3 years ago

7 0

He made an error is step 2

3x + 18 = 2x +8

subtract 2x from each side

x + 18 = 8

Anna35 [415]3 years ago

5 0

Answer:

Step-by-step explanation:

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If f(x) = 5x − 1 and g(x) = 2x2 + 1, what is the value of (f × g)(-3)?

Softa [21]

f(x) = 5x − 1 and g(x) = 2x^2 + 1

(f × g)(x) = (5x − 1)(2x^2 + 1)

(f × g)(x) = 10x^3 - 2x^2 + 5x - 1

Substitute x = - 3

(f × g)(-3) = 10(-3)^3 - 2(-3)^2 + 5(-3) - 1

(f × g)(-3) = 10(-27) - 2(9) -15 - 1

(f × g)(-3) =-270 - 18 - 16

(f × g)(-3) = -236

Answer

- 236

6 0

3 years ago

Can someone help me quickly with math hw?

Iteru [2.4K]

I need a question to answer first.

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2 years ago

Order -4,9 -7 -10, and -3 from least to greatest.

vovikov84 [41]

Answer:

-10,-7,-4,-3,9

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Find the value of x.<br> 33°<br> 107°<br> x

Kaylis [27]

Answer:

140

Step-by-step explanation:

Angles in a triangle add up 180 :

180 = 107 + 33 + y

y = 180 - (107+33)

y = 180 - 140

y = 40

Angles on a straight line add up to 180 so :

180 = x + y

180 = x + 40

x= 180 - 40

x = 140

Hope this helped and have a good day

7 0

1 year ago

Read 2 more answers

Suppose that a restaurant chain claims that its bottles of ketchup contain 24 ounces of ketchup on average, with a standard devi

Tanya [424]

Answer:

Confidence Interval = (23.776, 24.224)

Step-by-step explanation:

Restaurant chain claims that its bottles of ketchup contain 24 ounces of ketchup on average.

⇒ Mean = 24 ounces.

Standard Deviation = 0.8

Number of bottles used for sample = 49

⇒ n = 49

Confidence level = 95%

Corresponding z value with 95% confidence level = 1.96

Now, confidence interval is given by the following expression :

$Mean \pm z^*\times \frac{\sigma}{\sqrt{n}}\\\\=24\pm1.96\times \frac{0.8}{\sqrt{49}}\\\\=24\pm 0.224$

Hence, Confidence Interval = (23.776, 24.224)

6 0

2 years ago