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jarptica [38.1K]
3 years ago
7

Math questions!! 30 points

Mathematics
1 answer:
vampirchik [111]3 years ago
5 0

Answer:

Excluded Value :  3 and  -5  

Step-by-step explanation:

hello :

Excluded Value :    and    

the excluded value when : x²+2x-15=0

( x²+2x+1)-1-15=0

means : (x+1)²-16=0       (x+1)²-4² = 0

by identity : a²-b² =(a-b)(a+b)

(x+1-4)(x+1+4) =0   so :      (x-3)(x+5) =0  means : x-3=0 or x+5=0

x=3 or x= -5

Excluded Value :  3 and -5

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What is the area of the the polygon 7ft 22ft 10ft
Harman [31]

Answer:1540

Step-by-step explanation:

7x10=70

70x22=1540

3 0
3 years ago
30w-(w+6)-(5w+4)=-(5w+6)+(-8+3w) ayuda porfavor con esta ecuacion
aleksklad [387]

Answer:

-  \frac{2}{13}

Step-by-step explanation:

30w-w-6-5w-4=-5w-6-8+3w

30w-w-4=-8+3w

29w-4=-8+3w

29w-3w=-8+4

26w=-8+4

26w=-4(divide bother side by 26)

w=-2/13

8 0
2 years ago
Is 4 raised to the 2nd power equal to 2 raised to the 3rd power? Explain how you know, is it true or false.
Serhud [2]

Answer:

this is false

Step-by-step explanation:

4 raised to the second power is 16 since that would be 4 times 4.

2 raised to the third power is 8 since that would be 2 times 2 times 2.

4 0
3 years ago
Read 2 more answers
Help!?!? Find the area of the shaded region. Round your answer to the nearest hundredth.
Lerok [7]

Check the picture below.

so if y = 2, then 2y = 4, thus

\textit{area of a segment of a circle}\\\\A=\cfrac{r^2}{2}\left(\cfrac{\pi \theta }{180}~~ - ~~sin(\theta )  \right)~~\begin{cases}r=radius\\\theta =\stackrel{degrees}{angle}\\[-0.5em]\hrulefill\\r=4\\\theta =60\end{cases}\\\\\\A=\cfrac{4^2}{2}\left(\cfrac{\pi (60) }{180}~~ - ~~sin(60^o )  \right)\implies A=8\left( \cfrac{\pi }{3}~~ - ~~\cfrac{\sqrt{3}}{2} \right)\\\\\\A=\cfrac{8\pi }{3}~~ - ~~4\sqrt{3}\implies A\approx 1.45

7 0
2 years ago
Tina baked a batch of 40 cupcakes. daisy baked 4/5 as many cupcakes as tina. miko baked 1/2 as many cupcakes as daisy. how many
Alex17521 [72]

The three girls baked 88 cupcakes altogether.

Cupcakes Baked by Each

Number of cupcakes baked by Tina, T = 40

It is given that Daisy baked 4/5 as many cupcakes as Tina.

Therefore, number of cupcakes baked by Daisy, D = (4T/5) (Applying fractions)

⇒ D = (4/5)×40

⇒ D = 4 × 8

⇒ D = 32

Also, it is given that Miko baked 1/2 as many cupcakes as Daisy.

Thus, number of cupcakes baked by Miko, M = D/2 (Applying fractions)

⇒  M = 32/2

⇒ M = 16

Calculating Total Number of Cupcakes Baked

Cupcakes baked by the three girls altogether = T + D + M

= 40 + 32 + 16

= 88

Hence, the girls together baked 88 cupcakes.

Learn more on fractions here:

brainly.com/question/10354322

#SPJ4

6 0
2 years ago
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