All categories

2 years ago

A recipe calls for 30 grams of sugar. Ramesh decides to decrease the sugar by 20%. How much sugar will Ramesh use?

Mathematics

1 answer:

stiv31 [10]2 years ago

6 0

Answer:

24 grams

Step-by-step explanation:

80% (100%-20%) of 30 is 24

You might be interested in

If (a2b−3c)34a−1b4c5=apbqcr What is the value of p+2q?

Naily [24]

<h2>Explanation:</h2>

Use BODMAS and algebra to arrive at the values of P = 5/2, q = -25/4 and r = -9/2.

Then substitute the values of p and q into p+2q to get -10

3 0

1 year ago

A researcher compares the effectiveness of two different instructional methods for teaching electronics. A sample of 138 student

yan [13]

Answer:

The 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 is (-8.04, 0.84).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the difference between population means is:

$CI=(\bar x_{1}-\bar x_{2})\pm z_{\alpha/2}\times \sqrt{\frac{\sigma^{2}_{1}}{n_{1}}+\frac{\sigma^{2}_{2}}{n_{2}}}$

The information provided is as follows:

$n_{1}= 138\\n_{2}=156\\\bar x_{1}=61\\\bar x_{2}=64.6\\\sigma_{1}=18.53\\\sigma_{2}=13.43$

The critical value of <em>z</em> for 98% confidence level is,

$z_{\alpha/2}=z_{0.02/2}=2.326$

Compute the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 as follows:

$CI=(\bar x_{1}-\bar x_{2})\pm z_{\alpha/2}\times \sqrt{\frac{\sigma^{2}_{1}}{n_{1}}+\frac{\sigma^{2}_{2}}{n_{2}}}$

$=(61-64.6)\pm 2.326\times\sqrt{\frac{(18.53)^{2}}{138}+\frac{(13.43)^{2}}{156}}\\\\=-3.6\pm 4.4404\\\\=(-8.0404, 0.8404)\\\\\approx (-8.04, 0.84)$

Thus, the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 is (-8.04, 0.84).

5 0

2 years ago

If ab is 2x+3 bc is 3x+5 and ac is 38 what is the value of x

ohaa [14]

Answer:

x would equal 8. because you would add AB and BC together and set it equal to AC

Hoped I helped

Can I get a brainliest

3 0

2 years ago

20 POINTS An electrician charges a set fee for every house call and then charges an hourly rate depending on how long the job ta

tatuchka [14]

Answer:

$the \: slope \: is \to \boxed{60}$

Step-by-step explanation:

$if \to C=65+60t \\ C=60t + 65 \\ but \: the \: \boxed{ c - intercept} \: is \: in \: the \: form \to \\ c = mt + b \\ hence \to \\ 60t = mt \\ m = \frac{60t}{t} \\ m = 60 \\ the \: slope \: is \to \boxed{60}$

5 0

2 years ago

Read 2 more answers

HELP PLS CLICK TO SEE THE QUESTION!!!

Maslowich

Answer:

3 1/4

Step-by-step explanation:

1) Convert 6 1/2 into a fraction and add it to 1/2.

6 -> 12/2

12/2 + 1/2 = 13/2

2) Divide the result by 2 (or multiple the result by the reciprocal of 2)

13/2 x 1/2 = 13/4 or 3 1/4

Hope this helped ^^

5 0

2 years ago