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3 years ago

Interior angle of a regular hexagon

Mathematics

2 answers:

zmey [24]3 years ago

8 0

Answer:

120 degrees the sum of all angle is 720 degrees In the above

yulyashka [42]3 years ago

4 0

Answer:

120 degrees the sum of all angle is 720 degrees In the above

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Expand and simplify (2x+5y) (x-3y)

Dmitry [639]

Should be simple:

Let's take this one at a time.

2x(x-3y)

You'd get:
$2x^2-3xy$
for the first one.

2nd one:
5y(x-3y)
you'd get:
$+5xy-3y^2$

Put them both together:
$2x^2-3xy+5xy-3y^2$

Combine like terms.

Your Answer:
$2x^2+2xy-3y^2$

3 0

3 years ago

Jenna worked at an ice cream cart for 8.75 hours on Friday, 7.5 hours on Saturday she made a total of 178.25 How much does Jenna

Musya8 [376]

Jenna gets paid a total of 10.97 cents an hour<span />

4 0

3 years ago

Read 2 more answers

Which of the following expressions correctly uses the properties of summations to represent

madam [21]

Answer:

Option C is correct.

$7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Step-by-step explanation:

Given the expression: $\sum_{i=1}^{18} (7i^2+9)$

Using properties of summation:

$\sum_{i=1}^{n} (a+bi) =\sum_{i=1}^{n} a + \sum_{i=1}^{n} bi$

$\sum_{i=1}^{n} a = an$

Using properties of summation in the given expression we have;

$\sum_{i=1}^{18} (7i^2+9)$

= $\sum_{i=1}^{18} 7i^2 + \sum_{i=1}^{18} 9$

= $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Therefore, the following given expression uses the properties of summation to represents is, $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

8 0

3 years ago

Read 2 more answers

5.<br>Find the sum of all two - digit natural numbers which are divisible by 3.

kykrilka [37]

Answer:

1665

Step-by-step explanation:

This is AP, where:

First term is: 12= 3*4
Last term is: 99= 3*33
Common difference is: 3
Number of terms is: 33- 3= 30 (because the 4th term is included)

S=1/2*30(12+99)= 1665

The sum of all two - digit natural numbers which are divisible by 3 is 1665

3 0

3 years ago

Emily and Kylie are 140 miles apart, traveling towards each other. If Kylie travels 12 mph and Emily travels 8 mph how long unti

Bogdan [553]

Answer: 7 hr

Step-by-step explanation:

Given

Distance between Emily and Kylie is $140\ \text{miles}$

Speed of Emily $v_e=12\ mph$

Speed of Kylie $v_k=8\ mph$

Distance traveled by Emily $\Rightarrow d_e=12t$

Distance traveled by Kylie $\Rightarrow d_k=8t$

$\Rightarrow 12t+8t=140\\\Rightarrow 20t=140\\\Rightarrow t=7\ hr$

They will meet after 7 hour.

3 0

3 years ago