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2 years ago

Need some help here... Image below. Please try and explain how you get the answer, as I do want to try and learn the material.

Mathematics

2 answers:

8_murik_8 [283]2 years ago

6 0

$60 for 100 and $65 for 150

Nana76 [90]2 years ago

5 0

Answer:

i think you divide 100 by 60 to get the answer for number 14 but im not sure

Step-by-step explanation:

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There are 6 gray keys for every 11 black keys. Also, the number of black keys is 2 less than twice the number of gray keys. Use

emmainna [20.7K]

$\text{ Answer: There are }12\text{ gray keys.}\\\\\text{ there are }22\text{ black keys.}$

Explanation:

Since we have given that

There are 6 gray keys for every 11 black keys .

So, the ratio will be 6:11

Let the number of gray keys be 6x

Let the number of black keys be 11x

Now, according to question,

$11x=2\times 2x-2\\\\11x=12x-2\\\\11x-12x=-2\\\\-x=-2\\\\x=2$

so,

$\text{ there are }6x=6\times 2=12\text{ gray keys.}\\\\\text{ there are }11x=11\times 2=22\text{ black keys.}$

8 0

2 years ago

Tom earns $12 a week mowing lawns. He spends

Gnoma [55]

Answer:

6 dollars on lunch because 36 divided by 6 is 6 lol and you should multiply 1/3 to 2/6 to have an even number so it would be 12 on music and 6 on lunch so 18 total spent and 18 saved

18 total saved

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

The graph shows a proportional relationship.

koban [17]

The unit rate is 4.5

8 0

3 years ago

The position function for a free-falling object is s(t) = -16t^2 + vt +5. A ball is thrown upward from the top of a 400-foot bui

mixer [17]

Answer:

6.21 seconds

Step-by-step explanation:

The position function of a free-falling object is,

$s(t) = -16t^2+v_0t+s_0$

Where,

$s_0$ = initial height of the object,

$v_0$ = initial velocity of the object,

Here,

$s_0=400\text{ feet}$

$v_0=35\text{ feet per sec}$

Hence, the height of the ball after t seconds,

$s(t)=-16t^2+35t+400$

When s(t) = 0,

$\implies -16t^2+35t+400=0$

$t=\frac{-35\pm \sqrt{35^2-4\times -16\times 400}}{2\times -16}$

$t=\frac{-35\pm \sqrt{1225+25600}}{-32}$

$\implies t\approx -4.02\text{ or }t\approx 6.21$

∵ Time cannot be negative,

Hence, after 6.21 seconds the ball will reach the ground.

4 0

3 years ago

Please help me . the image is attached

Vedmedyk [2.9K]

Answer:

50 times.

Step-by-step explanation:

Since the two coins are fair, each has a 1/2 chance of landing on heads. If both of them land on heads, that possibility would be 1/4 (1/2 * 1/2)

Because you are running the experiment 200 times, multiply 200 by 1/4:

200/4 = 50 times.

Hope this helps!

7 0

3 years ago