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3 years ago

If x = -6 and y = - 7 evaluate the expression.- 8-6xy+7

Mathematics

2 answers:

Nimfa-mama [501]3 years ago

8 0

Replace x and Y with the given values:

-8 - 6(-6) = -8 - -36 = -8 +36 = 28

-7 +7 = 0

timofeeve [1]3 years ago

6 0

Answer:

-8-6*6 = 28

-7+7=0

so, 28+0 = 28

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At 12 noon in anchorage Alaska Janice noticed that the temperature outside was 12

Alisiya [41]

I assume that you want to know the temperature at a certain timing.
Well, you know that at 12:00 pm, the temperature was 12 F and that it decreases by a steady rate of 2 F each hour.

This means that at 1:00 pm, the temperature was 12-2 = 10 F
At 2:00 pm, the temperature was 10-2 = 8 F
At 3:00 pm, it was 8-2 = 6 F
.......and so on

You can follow this sequence to the timing you are looking for.

7 0

3 years ago

This Question: 1 pt

zhenek [66]

$\huge{ \mathfrak{ \underline{ Answer }\: \: ✓ }}$

Angles forming linear pair are :

$\mathrm{\angle EFG \: \: and \: \: \angle GFH}$

And we know, they are supplymentary

$\mathrm{\angle EFG \: + \: \angle GFH} = 180 \degree$
$3n +1 9 \degree+ 2n + 36\degree = 180 \degree$
$5n + 55\degree = 180\degree$
$5n = 125\degree$
$n = 25\degree$

So, the measures of the given angles are :

$\mathrm{\angle EFG } = 3n + 19$
$\mathrm{ \angle EFG = (3 \times 25\degree) + 19}$
$\mathrm{ \angle EFG = 75 \degree+ 19\degree}$
$\mathrm{ \angle EFG = 94\degree}$

And

$\mathrm{ \angle GFH = 2n + 36}$
$\mathrm{ \angle GFH = (2 \times 25\degree) + 36\degree}$
$\mathrm{ \angle GFH = 50\degree + 36\degree}$
$\mathrm{ \angle GFH = 86\degree }$

_____________________________

$\mathrm{ ☠ \: TeeNForeveR \:☠ }$

6 0

3 years ago

Give the next number in this unusual sequence: 2,3,7,25,121,721,5041,40321.

malfutka [58]

Answer:

362881

Step-by-step explanation:

The right sequence should be

2,3,7,25,121,721,5041,40321, 362881

Here, the formula used is a(n)=n!+1 where n=1 to infininity

n(1) =2=1!+1=2

n(2)= 3=2!+1=3

n(3)=7=3!+1=7

n(4)=25=4!+1=25

n(5)=121=5!+1=121

n(6)=721=6!+1=721

n(7)=5041=7!+1=5041

n(8)=40321=8!+1=40321

n(9)=362881=9!+1=362881

3 0

3 years ago

two positive numbers x and y, with the maximum value 4, add up to 5. what is the difference between the maximum and minimum valu

Svetach [21]

Answer:

Step-by-step explanation:

Since the sum of the two numbers is 5, we can represent one of them by x and the other by 5-x. Then the desired product is ...

x²(5-x)³

A graphing calculator can show the extreme values of this on the interval 1 ≤ x ≤ 4. The maximum is 108 at x=2; the minimum is 16 at x=4.

The difference between the maximum and minimum is 108-16 = 92.

_____

If you like, you can take the derivative and set it to zero.

f(x) = x²(5 -x)³

f'(x) = 2x(5 -x)³ +x²(-3)(5-x)² = x(5 -x)²(2(5-x) -3x)

f'(x) = 5x(5-x)²(2-x)

This will be zero for x=0, x=5, and x=2. The points at x=0 and x=5 represent minima in the product. The values x=0 and x=5 are not in the domain of interest. The point at x=2 represents a maximum.

To find the function extremes on an interval, we need to evaluate the function where the derivative is zero, and also at the ends of the interval. So, the function values of interest are ...

f(1) = 1²·4³ = 64

f(2) = 2²·3³ = 108 . . . . product maximum

f(4) = 4²·1³ = 16 . . . . . . product minimum

The difference between the maximum and minimum is 92.

5 0

3 years ago

Given f(x) = x - 7 and g(x) = x2<br> Find g({4)).<br> g(f{4)) =

maksim [4K]

Answer:

g({4)). g(f{4)) = 144

Step-by-step explanation:

Given f(x) = x - 7 and g(x) = x^2 Find g({4)). g(f{4)) =

g(4) = 4^2 = 16

g(f(4)) = (4 - 7)^2 = 9

g({4)). g(f{4)) =16 * 9 = 144

3 0

3 years ago

If x = -6 and y = - 7 evaluate the expression.- 8-6xy+7​

If x = -6 and y = - 7 evaluate the expression.- 8-6xy+7