All categories

3 years ago

7 x (3 + 2) = (7 x 3) + (7 x 2) What property

Mathematics

2 answers:

qaws [65]3 years ago

7 0

Answer:

distributive

Step-by-step explanation:

7×(3+2)=(7×3)+(7×2)

21+14=21+14

35=35

krek1111 [17]3 years ago

4 0

Answer: Associative property.

Step-by-step explanation:

You might be interested in

PLEASE HELP QUICK!! If the local tax is 3% and you get paid $678 biweekly, what is the local tax deduction?

Anastasy [175]

tax reduction: $20.34

amount you're paid minus tax: $657.66

4 0

3 years ago

I NEED HELP ON #10!!!!!!!!!! please

postnew [5]

Answer:

the distance is 8

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Anybody know the answer?

Andreas93 [3]

Answer: The slope of the line is m, which is 3.

Step-by-step explanation:

Don’t mind the two parts I scribbled out, I didn’t a few extra steps when I misread the instructions. Just look at the top left corner and the right side of how I solve for the slope.

7 0

2 years ago

Oil is pumped continuously from a well at a rate proportional to the amount of oil left in the well. Initially there were millio

JulijaS [17]

Answer:

The amount of oil was decreasing at 69300 barrels, yearly

Step-by-step explanation:

Given

$Initial =1\ million$

$6\ years\ later = 500,000$

Required

At what rate did oil decrease when 600000 barrels remain

To do this, we make use of the following notations

t = Time

A = Amount left in the well

So:

$\frac{dA}{dt} = kA$

Where k represents the constant of proportionality

$\frac{dA}{dt} = kA$

Multiply both sides by dt/A

$\frac{dA}{dt} * \frac{dt}{A} = kA * \frac{dt}{A}$

$\frac{dA}{A} = k\ dt$

Integrate both sides

$\int\ {\frac{dA}{A} = \int\ {k\ dt}$

$ln\ A = kt + lnC$

Make A, the subject

$A = Ce^{kt}$

$t = 0\ when\ A =1\ million$ i.e. At initial

So, we have:

$A = Ce^{kt}$

$1000000 = Ce^{k*0}$

$1000000 = Ce^{0}$

$1000000 = C*1$

$1000000 = C$

$C =1000000$

Substitute $C =1000000$ in $A = Ce^{kt}$

$A = 1000000e^{kt}$

To solve for k;

$6\ years\ later = 500,000$

i.e.

$t = 6\ A = 500000$

So:

$500000= 1000000e^{k*6}$

Divide both sides by 1000000

$0.5= e^{k*6}$

Take natural logarithm (ln) of both sides

$ln(0.5) = ln(e^{k*6})$

$ln(0.5) = k*6$

Solve for k

$k = \frac{ln(0.5)}{6}$

$k = \frac{-0.693}{6}$

$k = -0.1155$

Recall that:

$\frac{dA}{dt} = kA$

Where

$\frac{dA}{dt}$ = Rate

So, when

$A = 600000$

The rate is:

$\frac{dA}{dt} = -0.1155 * 600000$

$\frac{dA}{dt} = -69300$

<em>Hence, the amount of oil was decreasing at 69300 barrels, yearly</em>

7 0

3 years ago

What are the zeros of the quadratic function in the graph?

blagie [28]

Answer:

Step-by-step explanation:

1. Define word "zeros"

zeros = x-intercepts

2. Find x-intercepts

(-2, 0) and (-4, 0)

x-intercepts = -2, -4 or -4, -2

6 0

3 years ago

Read 2 more answers