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2 years ago

Please help down below

Mathematics

2 answers:

Alex2 years ago

3 0

Answer:

1 7/10 is the answer

Step-by-step explanation:

let me know if not

Mnenie [13.5K]2 years ago

3 0

Answer:

1 and 7/10

Step-by-step explanation:

Start off with making the fractions have common denomators by making 1/2 into 5/10 and 4/5 into 8/10

3-1=2, but the fractions go into negative, eating into the 2 whole number.

5/10-8/10=-3/10, or 1 and 7/10 total.

I hope this helps and you have a great day :)

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A bakery used 25% more butter this month than last month. If the bakery used 240 kilograms of butter last month, how much did it

yawa3891 [41]

Answer:

300kg

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

I need 20 characters to post this so ignore

Natali5045456 [20]

KSKDWKDKSODMEMFKSCK HHHHhhhHhHhHhHhhsenfjsockwmf

6 0

3 years ago

I need help with this

vfiekz [6]

Answer:

Volume = 14.5 cm³

Step-by-step explanation:

Volume of cone = $\pi r^2\frac{h}{3}$

<u><em>Where r = 2 and h = 3.46</em></u>

Volume = $(3.14)(2)^2\frac{3.46}{3}$

Volume = (3.14)(4)(1.15)

Volume = 14.5 cm³

8 0

3 years ago

An article presents a study of the failure pressures of roof panels. A sample of 15 panels constructed with 8-inch nail spacing

wariber [46]

Answer:

There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches

Reject $H_0\ at\ 5%$ level of significance

Step-by-step explanation:

From the question we are told that:

Sample size 1 $n_1=15$

Spacing 1 $s_1=8$

Mean 1 $\=x_1=8.48$

Standard deviation 1 $\sigma_1=0.96 kPa$

Sample size 2 $n_2=16$

Spacing 2 $s_2=6$

Mean 1 $\=x_1=9.93$

Standard deviation 1 $\sigma_1=1.02 kPa$

Generally the hypothesis is mathematically given as

Null $H_0:\mu_1-\mu_2$

Alternative $H_a:\mu_1\mu_2$

Generally the equation for pooled estimate is mathematically given by

$S=\sqrt{\frac{(n_1-1)\sigma_1^2+(n_2-1)\sigma_2^2}{n_1+n_2-2} }$

Therefore

$S=\sqrt{\frac{(15-1)0.96^2+(16-1)1.02^2}{15+15-2} }$

$S=0.9905$

Generally the equation for test statistics is mathematically given by

$t=\frac{\=x_1+\=x_2}{S\sqrt{\frac{1}{n _1}+\frac{1}{n_2}}}$

$t=\frac{\=8.48-9.93}{0.9905\sqrt{\frac{1}{15}+\frac{1}{15}}}$

$t=-4.00091$

Therefore From table

$P value=P(t_{15+15-2}=4.00091)$

$P value=0.00041918$

$P$

Therefore

There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches

Reject $H_0\ at\ 5%$ level of significance

3 0

3 years ago

An ongoing promotion at a department store gives customers 20\%20%20, percent off the portion of their bill that is over \$100$1

gtnhenbr [62]

The equation best models the situation 100 + 0.8(x - 100) = 250.

The correct option is (D)

<h3>What is equation?</h3>

An equation in math is an equality relationship between two expressions written on both sides of the equal to sign.

The complete question is:

An ongoing promotion at a department store gives customers 20% off the portion of their bill that is over $100. Ruby's total bill at the department store after the promotion has been applied is $250. If x represents the amount of money Ruby would have spent on the same purchase at the department store without the promotion, which of the following equations best models the situation?

A. 0.2x + 100 = 250

B. 0.8x + 100 = 250

C. 100 + 0.2(x - 100) = 250

D. 100 + 0.8(x - 100) = 250

Given:

Department store gives 20 % off the portion of the bill that is over 100 dollars.

Total bill = 250

let x is the amount of money she would have spent without the promotion.

Then, cost after discount applies = 0.8 ( x - 100 ).

Hence, the equation is 100 + 0.8 (x - 100) = 250.

Learn more this concept here:

brainly.com/question/10952401

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7 0

1 year ago