2 years ago

If x=5,then3x+4x-15 equals

Mathematics

2 answers:

Lera25 [3.4K]2 years ago

6 0

Answer:

Step-by-step explanation:

3x + 4x - 15

3(5)+4(5) - 15

15 + 20 - 15

You can add the oposites

15 + (-15)

= 0

And then you have 20 left. Or add 15 + 20 = 35 then subtract 15 (which equals 20)

Hope this helps!

lubasha [3.4K]2 years ago

5 0

Answer:

Step-by-step explanation:

You might be interested in

As part of a community-service project, a local club has decided to paint 864 walls across town. The club has 36 volunteers. If

tankabanditka [31]

Answer:

24 walls per volunteers

Step-by-step explanation:

given that there are 864 walls and that there are 36 volunteers

if the walls are divided evenly over the 36 volunteers,

each volunteer would paint,

= 864 walls ÷ 36 volunteers

= 24 walls per volunteers

4 0

3 years ago

In the formula A(t) = A0ekt, A(t) is the amount of radioactive material remaining from an initial amount A0 at a given time t an

Alenkasestr [34]

Answer: 693 years

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

$A(t) =A_0e^{kt}$

k = rate constant

t = time taken for decomposition = 1

$A_0$ = Initial amount of the reactant

$A_t$ = amount of the reactant left = $A_0-\frac{0.1}{100}\times A_0=0.999A_0$

$0.999A_0=A_0e^{k\times 1}$

$0.999=e^k$

$k=-0.001year^{-1}$

for half life : $t=t_\frac{1}{2}$

$A_t=\frac{1}{2}A_o$

Putting in the values , we get

$\frac{1}{2}A_0=A_0e^{-0.001\times t_\frac{1}{2}$

$t_\frac{1}{2}=693 years$

Thus half life of this isotope, to the nearest year is 693.

8 0

3 years ago

50 pts if u anser this 4 me. thanks!

eimsori [14]

Answer:

the 1 mile and 3,218 meters in step 1 should be switched

6 0

3 years ago

Read 2 more answers

1.6 × 1.6 × 1.6 × 1.6

beks73 [17]

1.6 × 1.6 × 1.6 × 1.6 = 6.5536

3 0

3 years ago

Help me please no links

blsea [12.9K]

Answer:

Step-by-step explanation:

4 0

3 years ago