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3 years ago

. What is (4x2-9X+1) -(5x2-x-7) written in standard form?

Mathematics

1 answer:

bija089 [108]3 years ago

7 0

Answer:

(9-9x) - (3-x)

Step-by-step explanation:

(4x2 -9x +1) - (5x2 -x -7)

4x2+1= 9. 5x2-7= 3

(9-9x) - ( 3-x)

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Mhanifa can you please help with this??? Look at the picture attached. Thanks!

EastWind [94]

Answer:

Properties of a rhombus used to solve the following

Opposite angles are congruent
Diagonals are angle bisectors
Diagonals are perpendicular to each other
Adjacent angles are supplementary

(30)

∠2 = ∠3 = ∠5 = 27°
∠1 = ∠4 = 180° - (2*27°) = 126°

(31)

∠4 = 70°
∠1 = ∠2 = ∠3 = ∠5 = 1/2(180° - 70°) = 1/2(110°) = 55°

(32)

∠1 = ∠2 = ∠5 = 90° - 26° = 64°
∠3 = 26°
∠4 = 90°

5 0

3 years ago

If a cylinder has a height of 21 cm and a volume of 11,144 cm^3.

nataly862011 [7]

$\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h\qquad 
\begin{cases}
h=height\\
r=radius\\
----------\\
h=21\\
V=11,144
\end{cases}\implies 11,144=\pi \cdot r^2\cdot 21$

solve for "r"

7 0

3 years ago

. One-fifth of the plants in a garden are grape tomato plants. Two-ninths of the plants in the garden are cherry tomato plants.

vodomira [7]

Answer:52

Step-by-step explanation:

Given

one-fifth of the plants in a garden are grape tomato plant

two-ninth of the plants in the garden are cherry tomato plants

Also there are 18 grape tomato and 20 cherry tomato plants.

Let Total plants be x

Then Grape tomato plants $=\frac{x}{5}=18$

x=90

thus there are total of 90 plants

also grape tomato+cherry tomato=18+20=38

Thus there are 90-38=52 remaining plants.

6 0

3 years ago

2x-3y=8 . How do I solve this ?

shepuryov [24]

X equal what umber,and y equal what number?

8 0

3 years ago

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If x2 = 60, what is the value of x?

MArishka [77]

Answer:

x = ±2sqrt(15)

Step-by-step explanation:

x^2 = 60

Take the square root of each side

sqrt(x^2) = ±sqrt(60)

x = ±sqrt(60)

x = ±sqrt(4 *15)

x = ±2sqrt(15)

7 0

3 years ago

Read 2 more answers