All categories

3 years ago

Choose the ratio that is equivalent to this one: 7/3 A) 21/6, B) 21/9, C) 9/21

Mathematics

2 answers:

gogolik [260]3 years ago

5 0

Answer:

B) 21/9

Step-by-step explanation:

21/9 / 3/3 = 7/3

Hope this helps you out ;)

sweet [91]3 years ago

3 0

Answer: B) 21/9

Step-by-step explanation:if you multiply 3 by 3 you get 9.Multiply 7 by 3 you get 21.

You might be interested in

What is the value of f(-2)? A: 183 B: 221 C: -217 D: -179

Fofino [41]

Answer:

C:-217

Step-by-step explanation:

f(-2)=0.5*(-2)^2+9.5*(-2)-200

=2-19-200

=-217

8 0

3 years ago

Six students are working to simplify the expression shown.

krok68 [10]

Equivalent and Fully Simplified:

8+7x+4y

Equivalent and not fully simplified:

8+12x-5x+4y

15+7x+4y-7

Note Equivalent:

15-7x-4y

8+17x+4y

8+11y

Step-by-step explanation:

Given expression is:

$15+12x-5x+4y-7$

We will simplify the expression one by one

$8+12x-5x+4y$

$8+7x+4y$

Now we can categorize the expressions in boxes given below

Equivalent and Fully Simplified:

8+7x+4y

Equivalent and not fully simplified:

8+12x-5x+4y

15+7x+4y-7

Note Equivalent:

15-7x-4y

8+17x+4y

8+11y

Keywords: Expressions, simplification

Learn more about expressions at:

#LearnwithBrainly

6 0

3 years ago

You have three 1$ bills four $5 bills and two $10 bills in your wallet you select the bill at random without replacing the bill

Alexandra [31]

1/12 hope it helps!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

6 0

3 years ago

A certain manufactured product is supposed to contain 23% potassium by weight. A sample of 10 specimens of this product had an a

Taya2010 [7]

Answer:

(a) Null Hypothesis, $H_0$ : $\mu$ = 23%

Alternate Hypothesis, $H_A$ : $\mu$ $\neq$ 23%

(b) We conclude that the mean percentage is different from 23 and the manufacturing process will be re-calibrated.

(c) P-value is 0.6%.

Step-by-step explanation:

We are given that a certain manufactured product is supposed to contain 23% potassium by weight.

A sample of 10 specimens of this product had an average percentage of 23.2 with a standard deviation of 0.2.

Let $\mu$ = mean percentage of potassium by weight.

(a) Null Hypothesis, $H_0$ : $\mu$ = 23% {means that the mean percentage is equal to 23 and the manufacturing process will not be re-calibrated}

Alternate Hypothesis, $H_A$ : $\mu$ $\neq$ 23% {means that the mean percentage is different from 23 and the manufacturing process will be re-calibrated}

The test statistics that would be used here One-sample t-test statistics as we don't know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean percentage = 23.2

s = sample standard deviation = 0.2

n = sample of specimens = 10

So, the test statistics = $\frac{23.2-23}{\frac{0.2}{\sqrt{10} } }$ ~ $t_9$

= 3.162

The value of t test statistic is 3.162.

Since, in the question we are not given with the level of significance so we assume it to be 5%. Now, at 5% significance level the t table gives critical value of -2.262 and 2.262 at 9 degree of freedom for two-tailed test.

(b) Since our test statistic doesn't lie within the range of critical values of t, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that the mean percentage is different from 23 and the manufacturing process will be re-calibrated.

(c) The P-value of the test statistics is given by;

P-value = P( $t_9$ > 3.162) = 0.006 or 0.6%

3 0

3 years ago

What is the slope of the line containing (–3, 5) and (6, –1)

murzikaleks [220]

(-3,5)(6,-1)
slope = (-1 - 5) / (6 - (-3) = -6/9 which reduces to - 2/3 <=

8 0

3 years ago

Read 2 more answers