please help
if x = 3 and y=-4 find x2 + y2 and x2 -y2

Answer:

For 3x + 5y = -13 the answer is x= -13/3 + 5y/3

and for 2x + 15y=3 the answer x= 1.5 + (-15y/2)

Step-by-step:

For 3x+5y=-13 you have to add 5y on both sides. Then you have to divide by 3 on both sides and cancel out the common factor of 3. Then you would get x= 13/3 + 5y/3.

For 2x + 15y=3 you have to subtract 15y on both sides of the equation. You should have 2x=3 + (-15y). Then divide by 2 on both sides. 3 divided by 2 is 1.5 and -15y divided by 2 is -15y/2 since 2 doesn't have the same variable. so the answer should be x= 1.5 + (-15y/2).

Answer:

no idea so sorry

Step-by-step explanation:

cant understand your language can you translate in English

Answer:

42.5miles

Step-by-step explanation:

68÷8= 8.5

8.5×5= 42.5 miles

we use the numbers given to us because we are finding the estimate.

our estimate is correct because 68km= 42.3 miles

Answer:

The exact answer is 42.25 miles

Step-by-step explanation:

divide 68 by 8 and get 8.5. Multiply 8.5 by the 5 so you get 42.5. Which is a super close estimate.

Answer:

c and f

Step-by-step explanation:

Answer:

Step-by-step explanation:

In an inequality, sign of greater than or less than decides that the graph of the line will be a dotted line.

And sign of greater than means area above the dotted line.

Table for input output values,

x          -4           0            4           6          

y          -3          -4           -5        -5.5

Plot these points and join them by a dotted line.

Now we shade the area above the dotted line to show the solution area of the inequality.

Answer:

[tex]24\pi \: cm {}^{2} [/tex]

Step-by-step explanation:

The area of a cone is

[tex]\pi \times r {}^{2} + \pi \times r \times \sqrt{ {r }^{2} + {h}^{2} } [/tex]

The volume of the conical paper cup will be option (D) 24π

The steps are as follow:

r = base radius = 3 cm

h = height of cone = 8 cm

V = volume of cone = (1/3)πr²h.

V = (1/3)π*3²*8.

V = 24π

So, the volume of the conical paper cup will be option (D) 24π

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i think 2 bags or 1 bags hope it helps

The area of the farmer's land is 54 square yards and number of bags needed is 2. The correct option is (B).

A triangle is a two dimensional shape bound by three sides. The sum of the interior angles of a triangle is 180°. The longest side of a triangle is always less than the sum of other two sides.

For the given diagram, the following data is given as,

Base of the upper and lower triangle is 6.5 + 2.5 = 9 yards.

And, the height is given as 6 yards.

Now, the area of the land can be given as,

Area of upper triangle + Area of lower triangle

⇒ 1/2 × 9 × 6 +  1/2 × 9 × 6

⇒ 54 square yards.

As per the question, the area of the land is more than the soil contained in 1 bag.

Which implies the number of bags required is given as 2.

Hence, the area of land and number of bags required is obtained as  54 square yards and 2 respectively.

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Answer:

y = 2/5x - 1

Step-by-step explanation:

There are a couple of different ways to figure this out, but since you have a graph, the fastest way is to count the slope, or m in the formula, by counting the rise (units up) over run (units to the right), which is 2/5. Then, find the value of b by finding the y-intercept on the graph, or -1.

Answer:

3, 130 degrees

Step-by-step explanation:

Angles TUW and VUW are congruent, so their opposite sides will be congruent as well

GF and IF are congruent, so their opposite angles will be congruent as well. 65 + 65 is 130 degrees.

Answer:

[tex] \frac{1}{5 } = \frac{3}{8} = \frac{3}{5} = \frac{3}{4} = \frac{3}{7} = \frac{1}{9} = \frac{4}{5} = \frac{5}{6} = \frac{2}{3} = \frac{1}{10} [/tex]

Answer:

4/20= 1/5

9/24= 3/6

18/30= 3/5

5/45= 1/9

20/25= 4/5

10/12= 5/6

6/9= 2/3

4/40= 1/10

Step-by-step explanation:

What i did was use different numbers to divide them with the numerator and denominator.  

Answer:

y = 8

Step-by-step explanation:

sin(45 degrees) = √2/2

==> x = y = 8

Answer:

y = 8

Step-by-step explanation:

Answer:  th

Step-by-step explanation:

Answer:

205.28

Step-by-step explanation:

See the screenshot provided for full steps and solution.

Answer:

√16 or 10.77033

Step-by-step explanation:

distance formula

9514 1404 393

Answer:

  6.  A

  7.  C

  8.  E

Step-by-step explanation:

6. If s is the number of programs sold for $0.45 each, then the contribution to Devon's pay (p) from selling programs is 0.45s. The per-game pay is added to that to give Devon's total pay:

  p = 0.45s + 40 . . . . . matches choice A

__

7. If Robert earns $25 per hour for x hours in tips, his tip pay is 25x. The flat rate is added to that to give the amount Robert makes:

  y = 25x + 40 . . . . . matches choice C

__

8. The graph of a proportional relationship is a straight line through the origin. This description matches B and C only, choice E.

Answer:

It will be neither. Also, thanks for the points friend

Step-by-step explanation:

Answer:

The answer is neither.

Step-by-step explanation:

Answer:

20 liters

Step-by-step explanation:

The computation of the number of liters does it pump in 1 second is shown below:

Since the borehole pumps 7,2 kl of water i.e. 72,000 liters in one hour

Now the number of liters in 1 second is

= 72,000 × 1 seconds ÷ 3,600 seconds

= 20 liters

Answer:

The quadrilateral ABCD is a parallelogram

Step-by-step explanation:

The vertices of the quadrilateral ABCD are;

A(-2 -2), B(5, -2), C(4, -3)and D(-3, -3)

The slope of segment [tex]\overline {AB}[/tex] = (-2 - (-2))/(5 - (-2)) = 0

The length of segment [tex]\overline {AB}[/tex] = 5 - (-2) = 7 (points having the same y-coordinates)

The slope of segment [tex]\overline {AD}[/tex] = (-3 - (-2))/(-3 - (-2)) = 1

The length of segment [tex]\overline {AD}[/tex] = √((-3 - (-2))² + (-3 - (-2))²)  = √2

The slope of segment [tex]\overline {DC}[/tex] = (-3 - (-3))/(-3 - 4) = 0

The length of segment [tex]\overline {DC}[/tex] = 4 - (-3) = 7 (points having the same y-coordinates)

The slope of segment [tex]\overline {BC}[/tex] = (-3 - (-2))/(4 - 5) = 1

The length of segment [tex]\overline {AD}[/tex] = √((4 - 5)² + (-3 - (-2))²)  = √2

Therefore;

The opposite sites of the quadrilateral ABCD are equal; [tex]\overline {AB}[/tex] = [tex]\overline {DC}[/tex], [tex]\overline {AD}[/tex] = [tex]\overline {BC}[/tex]

Given that the slope of a line gives the inclination of the line on a graph, we have;

The opposite sites of the quadrilateral are parallel; [tex]\overline {AB}[/tex] ║ [tex]\overline {DC}[/tex], [tex]\overline {AD}[/tex] ║ [tex]\overline {BC}[/tex]

Therefore the quadrilateral ABCD is a parallelogram because the opposite sides of the quadrilateral ABCD are parallel.

Answer:

b=9

Step-by-step explanation:

divide by 3 on both sides to get the variable (b) by itself

Sry there is no answer well actually the answer has an infinite amount of answers but you can't just pick one and say that's that and this is with all of them... sorry

Answer:

15. 1800

16. 18759

Step-by-step explanation:

216 * 5 = (200 + 10 + 6) * 5 = 200 * 5 + 10 * 5 + 6 *5 = 1000 + 50 +30 = 1800

6,253 * 3 = (6000 + 200 + 50 + 3) * 3 = 18000 + 600 + 150 +9 = 18600 + 150 +9 = 18750 + 9 = 18759

Answer:

B is a convex polygon cause it points out

Answer:

14d + 12c -4

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

$0.14

Step-by-step explanation:

Answer:

0.14

Step-by-step explanation:

2.24÷16=0.14

Answer:

first you add all the sides up and then subtract the perimeter with all the added up sides u will get ur answer

Answer:

B

Step-by-step explanation:

The graph shows a turning point at x = - 1

This indicates a zero at x = - 1 with multiplicity 2

The corresponding factors are (x + 1) and (x + 1), thus

y = (x + 1)(x + 1) ← best describes the graph