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4 years ago

I need help with this, can someone help me?

Mathematics

1 answer:

Alinara [238K]4 years ago

5 0

The answer is C cause if you rotate it the shape looks different but if it had rotational symmetry it could be rotated less than 360 degrees and still look the same

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Kevin makes an initial deposit into a saving account with an unnual interest rate. the amount of money in kevin's saving account

dalvyx [7]

It represents the annual interest rate.

5 0

3 years ago

A carpenter lays 1,300 wood shingles the first day, 1,400 the second, and 1,500 the third. How many shingles are used in three d

ss7ja [257]

With this question, you are just going to add up the three numbers

1,300 + 1,400 + 1,500

This equals 2,200

Hope I helped!

7 0

4 years ago

This extreme value problem has a solution with both a maximum value and a minimum value. Use Lagrange multipliers to find the ex

pashok25 [27]

Answer with Step-by-step explanation:

We are given that

$f(x,y,z)=10x+10y+3z$

$g(x,y,z)=5x^2+5y^2+3z^2=43$

We have to find the extreme values of the function.

$f_x(x,y,z)=10,f_y(x,y,z)=10,f_z(x,y,z)=3$

$g_x(x,y,z)=10x,g_y(x,y,z)=10y,g_z(x,y,z)=6z$

$\Delta f(x,y,z)=\lambda \Delta g(x,y,z)$

Therefore,

$10=\lambda 10x\implies x=\frac{1}{\lambda}$

$10=10y\lambda\implies y=\frac{1}{\lambda}$

$3=6z\lambda$

$z=\frac{1}{2\lambda}$

Substitute the values in g(x)

Then, we get

$\frac{5}{\lambda^2}+\frac{5}{\lambda^2}+\frac{3}{4\lambda^2}=43$

$\frac{20+20+3}{4\lambda^2}=43$

$\frac{43}{4\lambda^2}=43$

$\lambda^2=\frac{43}{4\times 43}$

$\lambda=\pm\frac{1}{2}$

When $\lambda=\frac{1}{2}$ then,

$x=2,y=2,z=1$

When $\lambda=-\frac{1}{2}$

Then, $x=-2,y=-2,z=-1$

$f(2,2,1)=10+10+3=23$

$f(-2,-2,-1)=-10-10-3=-23$

Hence, maximum value of f(x,y,z) is 23 at (2,2,1) and minimum value of f(x,y,z) is -23 at (-2,-2 ,-1).

8 0

4 years ago

Deon bought a desktop computer and a laptop computer. Before finance charges, the laptop cost $250 less than the desktop. He pai

zysi [14]

Answer:

300

Step-by-step explanation:

Let x = cost of desktop computer; then x - 250 = cost of laptop computer

converting % to decimals, 9% = 0.09 and 6% = 0.06

Then, 0.09x + (x - 250)0.06 = $300

0.09x + 0.06x - 15 = $300

0.15x = $315

x = $2100

then x - 250 = $1850

Proof: $2100•0.09 + 1850•0.06 = $189 + $111 = $300

7 0

3 years ago

What number is 8% of 1,500?

Dima020 [189]

Answer:

120

Step-by-step explanation:

Solution for What is 8 percent of 1500:

8 percent *1500 =

(8:100)*1500 =

(8*1500):100 =

12000:100 = 120

Now we have: 8 percent of 1500 = 120

Question: What is 8 percent of 1500?

Percentage solution with steps:

Step 1: Our output value is 1500.

Step 2: We represent the unknown value with x.

Step 3: From step 1 above, 1500 = 100%

Step 4: Similarly, x = 8%

Step 5: This results in a pair of simple equations:

1500 = 100% (1).

x = 8% (2)

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

1500 = 100%

x 8%

Step 7: Again, the reciprocal of both sides gives

x = 8

1500 100

x = 120

Therefore, 8% of 1500 is 120

Hope this helps you!!!

Please mark as Brainliest

7 0

3 years ago