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lord [1]
3 years ago
6

What is (1-7x)(1+9x)

Mathematics
2 answers:
Vikentia [17]3 years ago
7 0

Answer:

1+2x-63x^2

Step-by-step explanation:

factor 1(1+9x)=1+9X

-7x(1+9x)=-7x-63x^2

add 1+9x-7x-63x2

Sveta_85 [38]3 years ago
5 0

ANSWER

(1-7x)(1+9x) =-  63 {x}^{2} + 2x + 1

EXPLANATION

The given product is (1-7x)(1+9x).

Expand using the distributive property.

(1-7x)(1+9x) = 1(1 + 9x) - 7x(1 + 9x)

(1-7x)(1+9x) = 1 + 9x - 7x -  63 {x}^{2}

Simplify to obtain:

(1-7x)(1+9x) = 1 + 2x -  63 {x}^{2}

You can rewrite in standard form to get,

(1-7x)(1+9x) =-  63 {x}^{2} + 2x + 1

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Solve.<br> y =-2x + 9<br> y =4x-3
sammy [17]

Answer:

X= 2 Y=5

Step-by-step explanation:

Set them equal

-2x+9=4x-3 add -2x to both sides and -3 to both sides

12=6x then divide by 6

x=2

plug in 2 to either equation and solve for Y.

Y=-2(2)+9

Y=5

5 0
3 years ago
What is (pi/3) radians converted to degrees? If necessary, round your answer to the nearest degree.
laiz [17]

60
it is 60 degree
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Can someone help me with this?
Mandarinka [93]

Answer:

Step-by-step explanation:

Area of rectangle = length * width

                             = (x + 4) (5x)

                             = x *5x + 4 *5x

                            = 5x² + 20x

Perimeter of rectangle = 2*(length + width)

                                     = 2*(x + 4 + 5x)

                                     = 2*(6x + 4)

                                   = 2*6x + 2 *4

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4 0
3 years ago
Not sure how to find what x equals
Llana [10]

Answer:

Its 48 °

Since its a triangle, the total angle will be 180°

So,

x° + 42°+90°=180°(90° as one angle in triangle is 90°)

x°=180°-90°-42°

x°=48°

7 0
2 years ago
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HI can someone do these 5 problems? it will really help me out I'll give out brainliest to the person who answers them. (No link
Softa [21]

Answer:

$73.60

$345

simple interest = amount deposited x time x interest rate

600 + (600 x 0.055 x 5) = $765

600 + (600 x 0.055 x 5) > $2000

$765  $2000

He would not have $2000 in 5 years

Step-by-step explanation:

Total cost of items purchased = $75 + (2 x $8.50) = 92

If there is a 20% discount, he would pay (100 - 20%) 80% of the total cost =

0.8 x $92 = $73.60

commission earned = percentage commission x amount of sales

10% x $3450

= 0.1 x 3450 = 345

Amount he would have in his account = amount deposited + simple interest

simple interest = amount deposited x time x interest rate

600 x 0.055 x 5 = $165

Amount in his account in 5 years = $165 + 600 = $765

He would have less than $2000 in his account. he would have $765

4 0
3 years ago
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