All categories

2 years ago

14 - 2xy when x = -6 and y = 2.

Mathematics

2 answers:

alex41 [277]2 years ago

8 0

Answer:38

Step-by-step explanation:

Variables come first. So you plug in -6 and 2, the new expression would be

14 - 2(-6)(2). Then you do the multiplication, so 2(-6)(2) becomes -24,

14 - (-24) is 38.

Paraphin [41]2 years ago

3 0

Answer:

$38$

Step-by-step explanation:

14 - 2xy when x = -6 and y = 2.

$14 - 2( - 6)(2) \\ 14 - 2 \times ( - 12) \\ 14 + 24 = 38$

You might be interested in

A right cone has a surface area of 440 square inches and a radius of 7 inches. Find its slant height.

EastWind [94]

Answer:

Surface Area of right cone

= $\pi r(r+\sqrt{h^2 + r^2}$

$440 = \pi *7*(7+\sqrt{h^2+7^2})\\\\440 = 7\pi (7 + \sqrt{h^2+7^2})\\\\\frac{440}{7\pi } = 7 + \sqrt{h^2+49}\\\\\frac{440}{7\pi } - 7 = \sqrt{h^2+49}\\\\\frac{440-49\pi}{7\pi} =\sqrt{h^2+49}\\\\$

$\frac{286.062}{21.99} =\sqrt{h^2+49}\\\\13.0087= \sqrt{h^2+49}\\\\(13.0087)^2 = (\sqrt{h^2+49})^2\\\\169.227 = h^2 +49\\\\169.227 - 49 =h^2\\\\120.227 = h^2\\\\h = \sqrt{120.227} = 10.96in$

7 0

2 years ago

20% of city employees ride the bus to work. This is up 10% from last year. What percent of employees rode the bus to work last y

Pepsi [2]

Answer:

18.18% of employees rode the bus to work last year

Step-by-step explanation:

This question can be solved using a rule of three.

Last year, a proportion of x employees riding the bus was 100% = 1.

This year, 20% = 0.2 ride the bus, which is 100 + 10 = 110% = 1.1 of last year.

0.2 - 1.1

x - 1

$1.1x = 0.2$

$x = \frac{0.2}{1.1}$

$x = 0.1818$

0.1818*100 = 18.18%

18.18% of employees rode the bus to work last year

4 0

2 years ago

Find the point on the sphere closest to the plane

Ratling [72]

Use the concept of Lagrange multipliers.

3 0

2 years ago

Which question represents the line through (0,0) and (2,5)?

madam [21]

Answer:

y=5/2x

Step-by-step explanation:

The line needs to go through the points (0,0) and (2,5).

With y=5/2x, there is no y-intercept, so it starts on the origin, (0,0). With the slope 5/2, you would rise 5 (y) from the origin, and run 2 (x), which gives you the point (2,5).

4 0

1 year ago

2. Find the exact area of a circle with a diameter of 5 yards. Use 3.14 for T. (1 point)

NemiM [27]

Answer:

Step-by-step explanation:

radius r = diameter/2 = 2.5 yards

area = πr² = 6.25π square yards ≅ 19.625 square yards

6 0

2 years ago