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8090 [49]
3 years ago
9

Find the vertex of y=5-4x-x^2

Mathematics
2 answers:
SSSSS [86.1K]3 years ago
3 0
The answer is (h,k)
(-2,9)
Levart [38]3 years ago
3 0

Answer:

(-2,9)

Step-by-step explanation:

rewrite in vertex form: y= -(x+2)^2+9

(-2,9)

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I need a fast reply please​
EastWind [94]

\implies {\blue {\boxed {\boxed {\purple {\sf {  \:A. \:- 8 {b}^{4}  + 10 {b}^{3}  + 10b}}}}}}

\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}

(7b + 7 {b}^{3}  - 6 {b}^{4} ) + (3 {b}^{3}  + 3b - 2 {b}^{4} )

➼\: 7b + 7 {b}^{3}  - 6 {b}^{4}  + 3 {b}^{3}  + 3b - 2 {b}^{4}

Combining like terms, we have

➼\:  - 6 {b}^{4}  - 2 {b}^{4}  + 7 {b}^{3}  + 3 {b}^{3}  + 7b + 3b

➼\: - 8 {b}^{4}  + 10 {b}^{3}  + 10b

\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}

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2 years ago
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Gala2k [10]
12b+36c+33 Should be the answer you just multiply each number in the parentheses by 3
7 0
3 years ago
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What is the perimeter of XY Z? please explain step by step
Naily [24]

The perimeter of ΔXYZ is 126 units.

Solution:

Given ΔPQR \sim ΔXYZ.

In ΔPQR,

PQ = 5, QR = 10, PR = 6

In ΔXYZ,  XY = 30

Perimeter of ΔPQR = PQ + QR + PR

                                = 5 + 10 + 6

                                = 21

Perimeter of ΔPQR = 21

To find the perimeter of ΔZYZ:

If two triangles are similar then the ratio of the perimeters of two similar triangles is same as the ratio of their corresponding sides.

$\Rightarrow\frac{PQ}{XY} = \frac{\text{Perimeter of} \Delta PQR}{\text{Perimeter of} \Delta XYZ}

$\Rightarrow\frac{5}{30} = \frac{21}{\text{Perimeter of} \Delta XYZ}

Do cross multiplication, we get

⇒ 5 × Perimeter of ΔXYZ = 30 × 21

⇒ 5 × Perimeter of ΔXYZ = 630

Divide by 5 on both sides of the equation.

⇒ Perimeter of ΔXYZ = 126

Hence the perimeter of ΔXYZ is 126 units.

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3 years ago
If Mrs garcia maintains a constant speed, consistent with the results above, how many words can she type in 49 minutes
schepotkina [342]
Ms.garcia will write 3430 in 49 minutes
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