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vaieri [72.5K]
2 years ago
13

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

Mathematics
2 answers:
Lera25 [3.4K]2 years ago
6 0

Answer:

20

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:

20

Step-by-step explanation:

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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:

3

Step-by-step explanation:

4 0
3 years ago
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