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3 years ago

Which are the solutions of x2 = –7x – 8?

Mathematics

2 answers:

m_a_m_a [10]3 years ago

4 0

Answer:

The answer is the fourth option.

Step-by-step explanation:

You start by converting the equation into standard form, resulting in x2+7x+8. You would then use the coefficients and plug them into the quadratic formula, [-(7)+√7(7)-4(1)(8)]/2 and [-(7)-√7(7)-4(1)(8)]/2. Simplified, this would become (-7+√49-32)/2 and (-7-√49-32)/2. After adding the numbers in the square root, you are left with (-7+√17)/2 and (-7-√17)/2

Anit [1.1K]3 years ago

3 0

Answer

x= -7, -1

Step-by-step explanation:

x^2= -7x- 8

x^2+ 7x+ 8 =0

x+7=0 x+1=0

x=-7 x=-1

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Find QD if QB=21 and PC=11

alexdok [17]

Answer:

The answer to your question is: 21

Step-by-step explanation:

Data

AB = BC = CD

BQ = 21

QD = ?

PC = 11

Process

Here there are 2 triangles

ΔQCB and ΔQCD

These triangles share one side QC

And one side measures the same BC = CD

And the ∠ BCQ = ∠ DCQ

Then these triangles are congruents SAS

if QB = 21 then QD = 21

4 0

4 years ago

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Alchen [17]

Answer:

36 ft

Step-by-step explanation:

The first step is to find the length of the hypotenuse of the newly formed right triangle. Using the Pythagorean theorem:

$x=\sqrt{10^2+24^2}=\sqrt{100+576}=\sqrt{676}=26$

Adding this to the 10 foot tall part of the tree that remains standing, you get an initial height of 26+10=36 feet. Hope this helps!

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3 years ago

A weather forecaster predicts that the May rainfall in a local area will be between 3 and 4 inches but has no idea where within

Alex777 [14]

Answer:

3/4

Step-by-step explanation:

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3 years ago

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artcher [175]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Rob has downloaded some songs. He then downloads 32 more songs. He now has a total of 187 songs.

PIT_PIT [208]

Answer:

s+32 =187 is the equation for the total number of songs downloaded

s=155 is the number of songs initially downloaded in this situation,

Step-by-step explanation:

s+32 =187

s=187-32 solve for s

s=155

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3 years ago