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3 years ago

Solve equation by factoring.

Mathematics

1 answer:

3241004551 [841]3 years ago

8 0

Hi ;-)

$x^2+6x-10=30 \ \ /-30\\\\x^2+6x-40=0\\\\a=1, \ b=6, \ c=-40\\\\\Delta=b^2-4ac=6^2-4\cdot1\cdot(-40)=36+160=196\\\\\sqrt{\Delta}=\sqrt{196}=14\\\\x_1=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-6-14}{2}=\boxed{-10}\\\\x_2=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-6+14}{2}=\boxed4$

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How high would a 2 story building be?

masha68 [24]

This would definitely vary but if I were to say I would probably think each story would be about 10 feet so it so 2 stories should be about 20 feet. but keep in mind that every building is unique.

7 0

3 years ago

Read 2 more answers

The angle by which turns clockwise about point b to coincide with is degrees. if from point b, a point e is drawn directly oppos

N76 [4]

The first drop-down menu answer is 63.9 And the second drop-down menu answer is 116.1

The complete question is as given below:-

The angle by which turns clockwise about point B to coincide with is degrees. If from point B, a point E is drawn directly opposite point C so that B, E, and C are on the same straight line, the angle by which turns counterclockwise to coincide with is degrees.

<h3>What is an angle?</h3>

The angle is defined as the span between two intersecting lines or surfaces at or close to the point where they meet.

I have attached the figure for this problem and there are two questions for this problem. The first is the angle needed for AB to turn to coincide with BC.

Simply, get add the measures of the angles ABD and DBC. So,

33.3 + 30.6 = 63.6 degrees

The second question is the angle needed for AB to turn to coincide with EB. Angle EBA is complementary with angle ABC. So,

180 - 63.6 = 116.4 degrees

Therefore for first drop-down menu answer is 63.9 And the second drop-down menu answer is 116.1

To know more about an angle follow

brainly.com/question/25770607

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2 years ago

Translate then simplify <br><br> A number n decreased by the difference nine and the number

Sphinxa [80]

Answer:

Step-by-step explanation

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3 years ago

According to the law of conservation of mass, in all chemical reactions _____.

myrzilka [38]

Answer:

The mass of all products must be equal to the mass of the reactants.

Step-by-step explanation:

<h2><u>Fill in the blanks </u></h2>

--According to the law of conservation of mass, in all chemical reactions<u> the mass of all products must be equal to the mass of the reactants.</u>

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3 years ago

Help with this pleaseee

Savatey [412]

Answer:

Sum of 100 terms of the sequence = 15050

Step-by-step explanation:

Given expression which represents a sequence is,

$\sum_{r=1}^{100}(3r-1)$

So the sequence will be,

2, 5, 8, 11, 14..........

So, the given sequence is an arithmetic sequence with,

First term of the sequence 'a' = 2

Common difference 'd' = 5 - 2 = 3

Sum of 'n' terms of an arithmetic sequence is given by,

$S_n=\frac{n}{2}[2a+(n-1)d]$

Here, n = number of terms

a = first term

d = common difference

$S_{100}$ = $\frac{100}{2}[2(2)+(100-1)(3)]$

= 50[4 + 297]

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Therefore, sum of 100 terms of the sequence = 15050

3 0

3 years ago