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2 years ago

Can someone help me with this problem please:

Mathematics

2 answers:

BigorU [14]2 years ago

8 0

Answer:

Step-by-step explanation:

1. $10x+65\geq 150$ and solve for x

$10x+65\geq 150\\$

-65 -65

$10x\geq 85$

/10 /10

$x\geq 8.5$ The waiter has to work at least 8.5 hours.

2. $5x+25\leq 80$ and solve for x

$5x+25\leq 80$

-25 -25

$5x\leq 55$

/5 /5

$x\leq 11$ Mateo can buy at most 11 phone cases.

Charra [1.4K]2 years ago

6 0

11 phone cases !!! Hope this helps :)

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PLZZZZZZZZZ HELP THERE IS JUST THIS ONE AND IM STILL CONFUSED PLZZZ HELPPPP ME REAL QUICK ITS REALLY EASY

RUDIKE [14]

Angle a is 22.62 degrees
and
angle b is 67.38 degrees

7 0

2 years ago

Mar 12: 3

erastovalidia [21]

Answer:

Mar 18: 125
Mar 19: 318
Mar 20: 743
Mar 25: 15,070

Step-by-step explanation:

The six seemingly arbitrary points have no common difference or ratio, so cannot be modeled by a linear or exponential function.

The differences of the differences are not constant at any level, so the only polynomial model is 5th-degree. It is ...

(6n^5 -95n^4 +600n^3 -1825n^2 +2814n -1320)/60

where n = days after Mar 11. (Mar 12 corresponds to n=1.) The domain is n ≥ 1.

____

The 5th-degree polynomial increases very fast, but not as fast as an exponential function would.

The values for Mar 12 through Mar 25 are ...

3, 8, 11, 16, 25, 50, 125, 318, 743, 1572, 3047, 5492, 9325, 15070

6 0

2 years ago

The population of deer forest is currently 800 individuals. Scientists predict that this population will grow at a rate of 20 pe

jonny [76]

Answer:

<em>C. 3.8 years</em>

Step-by-step explanation:

<u>Exponential Growth </u>

The natural growth of some magnitudes can be modeled by the equation:

$P(t)=P_o(1+r)^t$

Where P is the actual amount of the magnitude, Po is its initial amount, r is the growth rate and t is the time.

The actual population of deer in a forest is Po=800 individuals. It's been predicted the population will grow at a rate of 20% per year (r=0.2).

We have enough information to write the exponential model:

$P(t)=800(1+0.2)^t$

$P(t)=800(1.2)^t$

It's required to find the number of years required for the population of deers to double, that is, P = 2*Po = 1600. We need to solve for t:

$800(1.2)^t=1600$

Dividing by 800:

$(1.2)^t=1600/800=2$

Taking logarithms:

$t\log 1.2=\log 2$

Dividing by log 1.2:

$t=\frac{\log 2}{ \log 1.2}$

Calculating:

t = 3.8 years

Answer: C. 3.8 years

6 0

2 years ago

Please help me with 7 and 10!! i’ll mark you brainliest:)

Irina-Kira [14]

Answer:

7. 18,480 feet

10. (a.) 1.5 (b.) 150% Sorry I don't know the answers to c & d.

Step-by-step explanation:

7. $\frac{3.5 miles}{1 ft.}$ × $\frac{5,280 ft.}{1 mile}$ = $18,480ft.$

Hope this helps!

7 0

3 years ago

-x -20 = 4x - 5

melomori [17]

Answer:

x=-3

Step-by-step explanation:

-x-20=4x-5

-20=5x-5

-15=5x

x=-3

6 0

2 years ago

Read 2 more answers