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3 years ago

Please can someone help. ill give brainliest

Mathematics

1 answer:

vodka [1.7K]3 years ago

6 0

Step-by-step explanation:

upper left angle and lower right are the same in a parallelogram (the other two angles match as well, but aren't useful)

so we can write this equation:

3x -15 = 2x +24

1x -15 = 24

x = 39

always do the same thing on both sides of an equation (here: subtract 2x, then add 15)

now you might give it a try yourself with the next problem that got two same things in it.

always grow stronger :)

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Some help me with these two questions please!!!!!!!

Hatshy [7]

Answer:

I believe #20. is A

Step-by-step explanation:

because if you use distributive property and multiply the 5 to the () numbers you will get your original question.

Also, i cant see all of the options for #21.

8 0

3 years ago

WILL GIVE BRAINLIEST

-BARSIC- [3]

Answer:

Step-by-step explanation:

i think

8 0

3 years ago

Read 2 more answers

Plz guys cmonnnnn there's gonna be more. WILL GIVE BRAINLIEST

Brums [2.3K]

Answer:

$6.3 \le p \le 8.1$

The third reading must be between 6.3 and 8.1 inclusive.

Step-by-step explanation:

To find the average of three numbers, add the three numbers and divide by 3.

Let the third reading = p.

The average of the three readings is

$\dfrac{7.4 + 7.9 + p}{3}$

This average must be between 7.2 and 7.8 inclusive. "Inclusive" means that the values 7.2 and 7.8 are allowed. That means the average must be greater than or equal to 7.2 and less than or equal to 7.8. We can write this as the following inequality.

$7.2 \le \dfrac{7.4 + 7.9 + p}{3} \le 7.8$

Simplify the numerator.

$7.2 \le \dfrac{15.3 + p}{3} \le 7.8$

Multiply the three sides by 3.

$21.6 \le 15.3 + p \le 23.4$

Subtract 15.3 from the three sides.

$6.3 \le p \le 8.1$

Answer: The third reading must be between 6.3 and 8.1 inclusive.

7 0

3 years ago

Find the volume of the cone

Mrrafil [7]

Answer:

Step-by-step explanation:

slant height l = 14cm

r = 6 cm

Use Pythagorean theorem.

h² + 6² = 14²

h² + 36 = 196

h² = 196 - 36

h² = 160

h = √160

h = 12.65 cm

$Volume=\frac{1}{3}\pi r^{2}h\\\\=\frac{1}{3}*3.14*6*6*12.64\\\\$

= 476.61 cubic cm

7 0

3 years ago

catering service offers 8 appetizers, 11 main courses, and 7 desserts. A banquet committee is to select 7 appetizers, 8 main

guapka [62]

Answer: The required number of ways is 46200.

Step-by-step explanation: Given that a catering service offers 8 appetizers, 11 main courses, and 7 desserts.

A banquet committee is to select 7 appetizers, 8 main courses, and 4 desserts.

We are to find the number of ways in which this can be done.

We know that

From n different things, we can choose r things at a time in $^nC_r$ ways.

So,

the number of ways in which 7 appetizers can be chosen from 8 appetizers is

$n_1=^8C_7=\dfrac{8!}{7!(8-7)!}=\dfrac{8\times7!}{7!\times1}=8,$

the number of ways in which 8 main courses can be chosen from 11 main courses is

$n_2=^{11}C_8=\dfrac{11!}{8!(11-8)!}=\dfrac{11\times10\times9\times8!}{8!\times3\times2\times1}=165$

and the number of ways in which 4 desserts can be chosen from 7 desserts is

$n_3=^7C_4=\dfrac{7!}{4!(7-4)!}=\dfrac{7\times6\times5\times4!}{4!\times3\times2\times1}=35.$

Therefore, the number of ways in which the banquet committee is to select 7 appetizers, 8 main courses, and 4 desserts is given by

$n=n_1\times n_2\times n_3=8\times165\times35=46200.$

Thus, the required number of ways is 46200.

7 0

4 years ago