the system ax-by=-16 and ax+2y=20 has one solution at the point (3,4). Find a and b. (a=4,b=7)

Answer:

Yes

Step-by-step explanation:

To check if (2,4) is a solution to the inequality, y<2x+2, substitute the values of x and y in the inequality and see if it holds good for those values

y=4, x=2

Let's see if 4<2*2+2 => 4<4+2 => 4<6

And the inequality is true. So, (2,4) is a solution to this inequality

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Algebraically, the point (1, -5) satisfies the first inequality, but it does not satisfy the second inequality because -5 is not greater than -5. Graphically, the point (1, -5) lies in the shaded area of the first inequality but lies on the dashed line of the second inequality, which is not inclusive. Therefore (1, -5) is not a solution to the given system of inequalities.

Answer:

55 is c

Step-by-step explanation:

what number times 4 equals 20? ...5

so times 11 and 5 and you'll get 55

Answer:

c=55

20/4 is 5

11*5=55

9514 1404 393

Answer:

  5 units

Step-by-step explanation:

In this geometry, all of the triangles are similar. So, the ratio of short side to long side can be ...

  x/10 = 10/4x

  4x^2 = 100 . . . . . cross multiply

  x^2 = 25 . . . . . . . divide by 4

  x = 5 . . . . . . . . . . square root

Answer:

the answer is 2

Step-by-step explanation:

this is because when you round 2.09 to the nearest whole number it is 2

Answer:

7.7u - 5.1v + 14.5w

Step-by-step explanation:

Given length:

Side A = (1.2u+1.8v) centimeters,

Side B = (6.5u+8.7w) centimeters

Side C = (5.8w-6.9v) centimeters

Perimeter of a triangle = side A + side B + side C

= (1.2u+1.8v) + (6.5u+8.7w) + (5.8w-6.9v)

= 1.2u + 1.8v + 6.5u + 8.7w + 5.8w - 6.9v

Collect like terms

= 1.2u + 6.5u + 1.8v - 6.9v + 8.7w + 5.8w

= 7.7u - 5.1v + 14.5w

Therefore, the perimeter of the triangle is 7.7u - 5.1v + 14.5w

Answer:

(1,-1)

Step-by-step explanation:

the coordinates of the image of point F after a reflection across the x-axis is (1,-1).

In mathematics, a reflection (also spelled reflexion) is a mapping from a Euclidean space to itself that is an isometry with a hyper plane as a set of fixed.

Here, given that,

Triangle EFG has vertices E(-3,1), F(1,1), and G (4,5).

We have to find the coordinates of the image of point F after a reflection across the x-axis.

Now, we know that,

The rule for reflecting over the X axis is to negate the value of the y-coordinate of each point, but leave the x-value the same.

Hence, the coordinates of the image of point F after a reflection across the x-axis is (1,-1).

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Answer:

7

Step-by-step explanation:

I hope this helps!

Answer:

7

Step-by-step explanation:

Substitute the values into the corresponding variables.

1 - 2(-2 - 1)

1 + 4 + 2

= 7

Answer:

$80 bucks

Step-by-step explanation:

Answer: the perimeter of the square is 44

Answer:

44 ft

Step-by-step explanation:

The area (A) of a square is calculated as

A = s² ( s is the side length )

Here A = 121, thus

s² = 121 ( take the square root of both sides )

s = [tex]\sqrt{121}[/tex] = 11

Perimeter = 4 × 11 = 44 ft

Answer: 10 plus 13.50 plus another 13.50 for another 10 songs and then whatever is half of 13.50 which is 6.75 is the cost of the entire 25 songs which is 27 plus 6.75 and you would get 33.75 hope this helps

Step-by-step explanation:

Answer:

its 33.75

Step-by-step explanation:

pay attention

The simplified form of the expression (2x^2+4−x^3)+(−4x^2+6x^3−2) in standard form is -2x^3 + 2x^2 + 2.

What is an expression?

An expression is a mathematical phrase that can contain numbers, variables, and operators. It represents a value or a calculation, but it is not simplified to a single value.

To simplify the expression (2x^2+4−x^3)+(−4x^2+6x^3−2) in the standard form, we can combine like terms and apply the order of operations.

Step 1: Add and subtract the terms inside the first set of parentheses:

2x^2 + 4 - x^3 + (-4x^2 + 6x^3 - 2)

Step 2: Combine like terms:

-2x^3 + 2x^2 + 4 - 2

Step 3: Rearrange the terms in standard form, which is the form with the variable with the highest exponent first, and the numerical constant last:

-2x^3 + 2x^2 - 2 + 4

Step 4: Combine the constant terms:

-2x^3 + 2x^2 + 2

Hence, The simplified form of the expression (2x^2+4−x^3)+(−4x^2+6x^3−2) in standard form is -2x^3 + 2x^2 + 2.

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Answer:

x= -b ±√b²- 4ac/2a

Step-by-step explanation:

ax2 + bx + c = 0

Dividing the quadratic equation by a gives

x2 + b/ax + c/a = 0

x2 + b/ax = - c/a

Applying the square formula

(x)^2 + 2(x) (b/2a) + (b/2a)^2= + (b/2a)^2- c/a

(x+b/2a)^2= b²/4a² - c/a

(x+b/2a)^2= b²/4a² - 4ac/4a²

(x+b/2a)^2= b²- 4ac/4a²

Taking square root of both sides gives

(x+b/2a)= ±√b²- 4ac/2a

x= -b/2a±√b²- 4ac/2a

x= -b ±√b²- 4ac/2a

This is called the quadratic formula and it can solve the value for x for the given value of a, b and c for the quadratic equation.

From this it is concluded that

Discriminant = b2 - 4ac > 0 means there will be two distinct real roots. Discriminant = b2 - 4ac = 0 means there will be only one real root. Discriminant = b2 - 4ac < 0 means there will be no real roots.

This is because a square root of a value greater than 0 is possible and gives two values for roots of x.

The square root of a value less than 0 gives a negative number and therefore the roots are an imaginary number.

The square root of a value greater equal to 0 gives a zero leaving behind only one real root.

Answer:

2,5

Step-by-step explanation:

basta isipin mo BWHAHAHAHAHHA balakadan

Answer:

Step-by-step explanation:

12 ÷(-6) = -2

-15÷(-3) = 5

Answer:

pretty sure its c

Step-by-step explanation:

Answer:

A is the answer.

Step-by-step explanation:

Answer:

6.35

Step-by-step explanation:

Answer:

Straight angle I hope if this helps please mark me as brainliest

Step-by-step explanation:

180° degrees

Answer:

A should be 42 and G should be i think 28-180 which is 152. hope that helps

Answer:

z=−159

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

1

3

z+18=−35

Step 2: Subtract 18 from both sides.

1/3z+18−18=−35−18

1/3z=−53

Step 3: Multiply both sides by 3.

3*(1/3z)=(3)*(−53)

z=−159

Answer:

$15.90

Step-by-step explanation:

$1.20 x .25 is the cost of 1/4 pound = $ 0.30

13 lbs × 1.20 = $15.60

15.6 + .3=15.9

Answer:

10

Step-by-step explanation:

one possible way to do this is to simply observe that 12*2 =24, so 5 shares must also be multiplied by 2

another way is to set up a proportion, 5/12=x/24, cross multiply, 5*24=12x, solve for x, x=(5*24)/12=10

Answer:

1 solution.

Step-by-step explanation:

Step 1: Write equation

-9s + 9 = -8s

Step 2: Solve for s

Step 3: Check

Plug in s to verify it's a solution.

-9(9) + 9 = -8(9)

-81 + 9 = -72

-72 = -72

Answer:

one solution s=9

Step-by-step explanation:

-9s + 9 =-8s, add 9s on both sides

+9s        +9s

-------------------

9=s

it's both a function and relation a function because it has independent variable and dependent variable and it's a relation because there is a relationship between the values

Answer:

x = 25

Step-by-step explanation:

3x + 4x + 5 = 180

        7x + 5 = 180

              - 5     - 5

              7x = 175

                x = 25

Answer:

575mL= 0.575 Liters

0.987 Meters = 987 Millimeters

24 Kilograms = 24000 Grams

1,350 cm = 13.5m

[tex]Ainsley \: walked \: in \: \frac{1}{3} \: \: of \: a \: day \ \: = \frac{3}{5} mile[/tex]

[tex] = \frac{1}{3} \times 24 = \frac{3}{5} [/tex]

[tex]8 \: hours = \frac{3}{5} \: miles[/tex]

[tex]Sarah \: walked \: in \: \frac{2}{6} of \: a \: day \: = \frac{5}{8} miles[/tex]

[tex] \frac{2}{6} \times 24 = \frac{5}{8} [/tex]

[tex]8 \: hours \: = \frac{5}{8} \: miles[/tex]

Let us see who walked more :

[tex]Ainsley \: walked \: = \frac{3 \times 8}{40} [/tex]

[tex] = \frac{24}{40} \: miles[/tex]

[tex]Sarah \: walked \: = \frac{5 \times 5}{40} [/tex]

[tex] = \frac{25}{40} \: miles[/tex]

[tex] \frac{24}{40} < \frac{25}{40} [/tex]

Sarah walked farther than Ainsley .

[tex] \frac{25}{40} - \frac{24}{40} = \frac{1}{40} \: miles[/tex]

∴ Sarah walked farther than Ainsley by 1/40 miles .

The elephant that weigh 2.85 tons after rounding up is [tex](fanny: 2.849 tons)[/tex]

Therefore,  Fourth option is correct.

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Answer:

Angle bisector

Step-by-step explanation:

A bisector cuts a line into two even parts, therefore an angle bisector would split an angle into two congruent angles, each that have exactly half the measure of the original angle.

Answer:

5*10^10

Step-by-step explanation:

10 to the power of 10 is 10^10.

10^10*9 is 90000000000

10^10*4 is 40000000000

90000000000-40000000000=50000000000

5*10^10

Answer:

44.9 megabytes

Step-by-step explanation:

all you need to do is find 19.7% of 228!

19.7% of 228 = 44.916

Answer:

C) 5.2

Step-by-step explanation:

The real thing looks like this 5.19615242 …

But if you round it, the answer would be 5.2.

Answer:

B

Step-by-step explanation:

Round to the nearest integer. Its closest to 5, because its sqrt 25