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BigorU [14]
3 years ago
7

What is the value of this expression when x=-6 and y= -1/2? 4(x^2+3)-2y

Mathematics
2 answers:
daser333 [38]3 years ago
5 0

Answer:

44

Explanation:

Substituting

6

for

x

and

−

2

for

y

gives:

3

x

y

+

2

x

2

−

y

3

→

(

3

×

6

×

−

2

)

+

(

2

×

(

6

)

2

)

−

(

−

2

)

3

→

(

−

36

)

+

(

2

×

36

)

−

(

−

8

)

→

−

36

+

72

+

8

→

44

Hope I did not make it hard enough

Please give me Brainliest

Semmy [17]3 years ago
5 0

Answer:

157

Step-by-step explanation:

Given 4(x^2+3)-2y, substitute -6 for x and -1/2 for y:

4([-6]^2 + 3) - 2(-1/2), or

4 (36 + 3) + 1, or

4(39) + 1, or, finally, 157.

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Vitek1552 [10]

\text{If you want the domain of this function then it is}~x\leq 0 ~ \text{or} ~ (-\infty ,0]

6 0
3 years ago
Round each decimal to the nearest whole number 4.5​
Vikentia [17]

its is the closet one too the right one

3 0
4 years ago
A plane is descending into the airport. After 5 minutes it is at a height of 6500 feet. After 7 minutes it is at a height of 590
Jet001 [13]

Let's assume

height of plane  in feet =h

time in minutes =t

we are given

A plane is descending into the airport. After 5 minutes it is at a height of 6500 feet

so, we get one point as (5,6500)

After 7 minutes it is at a height of 5900 feet

so, we get another point as (7,5900)

we can use point slope form of line

y-y_1=m(x-x_1)

points as

(5,6500)

x1=5, y1=6500

(7,5900)

x2=7 , y2=5900

Calculation of slope(m):

m=\frac{y_2-y_1}{x_2-x_1}

now, we can plug values

m=\frac{5900-6500}{7-5}

m=-300

Equation of line:

we can use formula

y-y_1=m(x-x_1)

we can plug values

h-6500=-300(t-5)

h=-300t+8000

Time of landing:

we can set h=0

and then we can solve for t

h=-300t+8000=0

t=\frac{80}{3}min..............Answer

5 0
4 years ago
A furniture store received an order for 8,367 tables they can fit 7 tables in the lower shipping box how many shipping boxes whe
-BARSIC- [3]

1195 boxes are needed to ship all the tables

<em><u>Solution:</u></em>

Given that, furniture store received an order for 8,367 tables

They can fit 7 tables in the lower shipping box

To find: Number of shipping boxes needed to ship all the tables

From given,

Total number of tables = 8367

Number of tables fit in one shipping box = 7

Thus, we can find the number of shipping boxes needed to ship all the tables by dividing total number of tables by number of tables fit in one shipping box

\text{Number of shipping boxes needed } = \frac{\text{Total number of tables}}{\text{Number of table fit in one box}}

Substituting the values we get,

\text{Number of shipping boxes needed } = \frac{8367}{7}=1195.28 \approx 1195

Thus 1195 boxes are needed to ship all the tables

8 0
4 years ago
Shortly after their arrival, Europeans began introducing pigs to the Americas as a source of food. Some escaped, and others were
natka813 [3]

Answer: About 800 thousand

The more accurate value is 807,528 but this is also an approximation.

=======================================================

Work Shown:

t = \text{number of years since the year 2000}

P_0 = \text{population (in millions) in the year 2000}

P = P_0(1.2)^t\\\\5 = P_0(1.2)^{10}\\\\5 \approx P_0*6.1917364224\\\\P_0 \approx \frac{5}{6.1917364224}\\\\P_0 \approx 0.80752791444922\\\\P_0 \approx 0.807528\\\\

That's the rough population of wild pigs (in millions) for the year 2000.

Multiply by 10^6 to get it in terms of units instead.

0.807528\times10^6 = 807,528

There were roughly 800 thousand wild pigs in the year 2000.

7 0
2 years ago
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