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Ganezh [65]
3 years ago
8

Use the Distributive Property to expand this expression. z(–6.4 – 3.5x)

Mathematics
1 answer:
dedylja [7]3 years ago
3 0

Answer:

z\left(-6.4\:-3.5x\right)=-6.4z-3.5zx

Hence, Option 'C' is true.

Step-by-step explanation:

Given the expression

z\left(-6.4\:-3.5x\right)

Apply distributive law:   a\left(b-c\right)=ab-ac

Here:  a=z,\:b=-6.4,\:c=3.5x

so the expression becomes

z\left(-6.4\:-3.5x\right)=z\left(-6.4\right)-z\cdot \:\:3.5x

                         =-6.4z-3.5zx                 ∵  +\left(-a\right)=-a

Therefore,

z\left(-6.4\:-3.5x\right)=-6.4z-3.5zx

Hence, option 'C' is true.

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Find the zeroes of the polynomial function f(x)=x^4-5x^3+11x^2-25x+30.
katen-ka-za [31]

Step-by-step explanation:

x⁴ − 5x³ + 11x² − 25x + 30

x⁴ − 5x³ + 6x² + 5x² − 25x + 30

x² (x² − 5x + 6) + 5 (x² − 5x + 6)

(x² + 5) (x² − 5x + 6)

(x² + 5) (x − 2) (x −3)

The zeros are 2, 3, and ±√5i.

7 0
3 years ago
Solve for X<br> x/7 = -8<br> Please help!!!<br> Worth 20 points!!!<br> I need an answer ASAP!!!
Vikentia [17]

Answer:

x = -56

Step-by-step explanation:

x/7 = -8

Multiply each side by 7

x/7 *7 = -8*7

x = -56

8 0
3 years ago
Nehal is a real estate developer, and he is designing a new neighborhood. The neighborhood will have four streets, each of which
ololo11 [35]

Answer:

240 houses

Step-by-step explanation:

Given that:

Number of streets = 4

Length of each street = 3/4 miles long

Street is divided into lots with one house built per lot

1 mile = 5289 feets

3/4 miles = (3/4) * 5280 = 3960 feets

Hence, street is 3960 feets long

Since each lot must have at least 65 feet frontage along the street:

Number of lots per street :

Length of street / frontage length

3960 ft / 65 ft = 60.92

Hence, maximum number of lots per street = 60 lots per street

Maximum number of houses in New neighborhoods :

Number of lots per street × number of streets

= 60 × 4

= 240 houses

4 0
3 years ago
If x + t =a and x = 3 then why am i so short
agasfer [191]
Good question, I ask myself the same thibg everyday
7 0
3 years ago
One year, the population of a city was 352,000. Several years later it was 337,920.
kvasek [131]

hi

here is  the  method :

you take  Value 1  and Value 2

And you do :   ( Value 2 - Value 1)  / (Value 1 )    * 100

Here we have :    Value 1 = 352 000

                            Value 2 =  337 920

So now we apply :

( 337 920 - 352 000 )  /  ( 352 000)   * 100 =  -4  

Population decreased by by  4 %

You can also make :  

352 000 * X = 337 920

                 X =  337 920 / 352 000

                 X = 0.96

if  the multiplier is  0.96 ,  it's mean that we lost  1 -0.96 = 0.04  

which mean  - 4%

8 0
1 year ago
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