4 years ago

The one about distibutive property?

Mathematics

1 answer:

Angelina_Jolie [31]4 years ago

6 0

The answer for the distibutive oneis 7(4+6)

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2. QS bisects 2 PQR Р S 29° R What is m

drek231 [11]

Answer:

slope

Step-by-step explanation:

7 0

3 years ago

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui

Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= $\frac{dx}{dt}=1. 8 m/s$

$\triangle ABD\sim\triangle ECD$

Therefore, $\frac{AB}{EC}=\frac{BD}{CD}$

$\frac{y}{2}=\frac{12}{x}$

$xy=24$

Differentiate w.r.t t

$x\frac{dy}{dt}+y\frac{dx}{dt}=0$

$x\frac{dy}{dt}=-y\frac{dx}{dt}$

$\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}$

When the man is 4 m from the building

Then, we have x=12-4=8 m

$\frac{dx}{dt}=1.8 m/s$

Substitute the values in above equation then, we get

$8y=24$

$y=\frac{24}{8}=3$

Substitute the values then we get

$\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s$

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

8 0

3 years ago

Please help fast!! A, B, C or D?

MakcuM [25]

Answer:

the answer would be is 6

4 0

3 years ago

Read 2 more answers

if the reserve rate is 10% and a bank receives a deposit of $320,000, how much of the $320,000 is the bank free to loan out?

Irina18 [472]

I think its 32,000,
320,000 - 10% = 288,000 - 320,000 = 32,000

7 0

3 years ago

Read 2 more answers

If g(x) = 2x2 - 4 and f(x) = 4x - 9, find

Troyanec [42]

Answer:

Step-by-step explanation:

plug in the value to the given expression

f(-4) = 4(-4) - 9

f(-4) = -16 - 9

f(-4) = -25

5 0

3 years ago