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Lena [83]
2 years ago
6

Plssss helppppp and thanks you if answers are actually true then I give brain:)

Mathematics
1 answer:
san4es73 [151]2 years ago
7 0
The 3rd one and the last one.
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X^3-13x^2+40x=0 quadratic
lutik1710 [3]

Answer:

x(x-5)(x-8)

or

x=5

x=8

Step-by-step explanation:

  1. x(x^2-13x+40)
  2. x(x-5) (x-8)
6 0
3 years ago
50 POINTS!!!
san4es73 [151]

Step-by-step explanation:

<u>Step 1:  Determine an ordered pair</u>

A solution of an equation just means that the point lies on the line.  We can find any y-value when we plug in a specific x-value.  For example, if we want to know what ordered pair lies at x=1, we just plug in y = -1/2(1) and solve for y which gives us -1/2.  This gives us an ordered pair of (1, -1/2).  We can continue to do this for any x value.

We can also reverse the order and plug in the y-value and get the x-value in order to accomplish the same goal but it's a bit harder.

Hope this helps!

6 0
1 year ago
Read 2 more answers
Pls help:Find all the missing elements:
Yuliya22 [10]

Answer:

<h3>B = 48.7° , C = 61.3° , b = 12</h3>

Step-by-step explanation:

In order to find B we must first angle C

To find angle C we use the sine rule

That's

\frac{ |a|  }{ \sin(A) }  =  \frac{ |c| }{ \sin(C) }

From the question

a = 15

A = 70°

c = 14

So we have

\frac{15}{ \sin(70) }  =  \frac{14}{ \sin(C) }

\sin(C)  =  \frac{14 \sin(7 0 ) }{15}

C = \sin^{ - 1} (  \frac{14 \sin(70) }{15} )

C = 61.288

<h3>C = 61.3° to the nearest tenth</h3>

Since we've found C we can use it to find B.

Angles in a triangle add up to 180°

To find B add A and C and subtract it from 180°

That's

A + B + C = 180

B = 180 - A - C

B = 180 - 70 - 61.3

<h3>B = 48.7° to the nearest tenth</h3>

To find b we can use the sine rule

That's

\frac{ |a| }{ \sin(A) }  =  \frac{ |a| }{ \sin(B) }

\frac{15}{ \sin(70) }  =  \frac{ |b| }{ \sin(48.7) }

|b|  =  \frac{15 \sin(48.7) }{ \sin(70) }

b = 11.9921

<h3>b = 12.0 to the nearest tenth</h3>

Hope this helps you

6 0
3 years ago
What is the measure of the angle at the tail end of the kite? if the top area is where its pointed is 122?
nataly862011 [7]

Answer:

The angle is 58 degrees

Step-by-step explanation:

Given

See attachment for kite

Required

The angle at the tail end

Represent this angle with x.

From the attached kite, we have:

1 angle = 122

2 angles = right-angled

So, we have:

x + 122 +90+90 = 360 --- sum of angles in a kite

x + 302 = 360

Solve for x

x =- 302 + 360

x =58^\circ

8 0
2 years ago
Question<br> Simplify the expression 7(a−3+4b).<br><br> 7(a−3+4b)=
Arte-miy333 [17]

Answer:

7a+28b=21

Step-by-step explanation:

7×a=7a

7×-3= -21

7×+4b=+28b

so....

7a-21+28b=0

7a+28b=21

5 0
2 years ago
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