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2 years ago

Anyone?! please I need to get this done

Mathematics

1 answer:

alexira [117]2 years ago

5 0

Answer:

Step-by-step explanation:

Surface area of the object = 2 (lw + wh + hl) = 2 (10× 6 + 6 × 10 + 10 × 10)

= 2 ( 60 + 60 + 100) = 2 × 220 = 440 ft.²

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At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?

Rudiy27

Hello!

To solve this, find the cost of a single light bulb first, by dividing 9 / 5.

9 / 5 ==> 1.80

One light bulb is $1.80

Now, multiply 1.80 by 7.

1.80 * 7 = 12.6

7 light bulbs cost $12.6

Hope this helps! ☺♥

6 0

3 years ago

Read 2 more answers

SinA=(7/25), determine CosA and TanA exactly

bixtya [17]

Answer:

Cos A = 24/25 & Tan A = 7/24

Step-by-step explanation:

See the attached figure.

Construct a right triangle and sign one angle as A

So, Sin A = opposite/hypotenuse = 7/25

∴hypotenuse = 25 and opposite = 7

∴ adjacent = √(25² - 7² ) = √576 = 24

∴ Cos A = adjacent/hypotenuse = 24/25

And

Tan A = opposite/adjacent = 7/24

5 0

2 years ago

The stem and leaf plot below gives sample air fares from Dallas to two cities: Atlanta and L.A

garik1379 [7]

The answer is Atlanta

7 0

3 years ago

Read 2 more answers

Find the linear approximation of the function f(x, y, z) = x2 + y2 + z2 at (4, 4, 7) and use it to approximate the number 4.022

miss Akunina [59]

Answer:

80.66

Step-by-step explanation:

$L\left( x \right) = f\left( a \right) + f'\left( a \right)\left( {x - a} \right)$

$f(x, y, z) = x^2+y^2+z^2$

Since we have three variables,

$L(x, y,z) = f(a, b,c) + f_x (a, b,c) (x - a) + f_y (a, b,c) (y - b) +f_z(a,b,c)(z-c)$

$f(4, 4, 7) = 4^2+4^2+7^2=81$

$f_x (a, b,c)=2x=2*4=8\\f_y (a, b,c)=2y=2*4=8\\ f_z(a,b,c)=2z=2*7=14$

Therefore:

$L(x, y,z) = 81+ 8(x - 4) + 8 (y - 4) +14(z-7)$

Using the above:

f(4.02, 3.99, 6.97) =81+ 8(4.02 - 4) + 8 (3.99 - 4) +14(6.97-7)=80.66.

The approximation of $4.02^2 + 3.99^2 + 6.97^2$ is 80.66000.

3 0

2 years ago

Simplify the polynomial: 2(x+8)-5(x-3)

jarptica [38.1K]

Answer:

-3x + 31

Step-by-step explanation:

First distribute

2x + 16 -5x +15

Collect like terms

-3x + 31

3 0

3 years ago