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Tamiku [17]
3 years ago
5

each evening, Marisol spend at least twice as much time reading as she spends doing homework. If Marisol works on her homework f

or 42 minutes, how much time can she spend reading?
Mathematics
2 answers:
erica [24]3 years ago
8 0
To get the result we can use knowledge that reading is 2 times longer than HW.
To find this value we just have to multiply 42 times 2 so
40*2=80
Its 1 hour and 20 min - its the result
Vadim26 [7]3 years ago
7 0
Multiply 42 times 2 and your answer will be 84
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Sarah started with 50 dollars in her bank account. Each month, she puts 25 more dollars in her account. The amount of money in d
Basile [38]


D=25m+50

D=(25)(8)+50

D=200+50

D=250

There will be $250 after 8 months.

5 0
3 years ago
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Which of the following is not equal to sin⁡(-230°)?
xenn [34]

From trigonometry we know that:

if sin(\theta)=sin(\alpha)

then, \theta=n\pi+(-1)^n\alpha (where n is an integer)

This can be rewritten in degrees as:

\theta=n(180^{\circ})+(-1)^n\alpha.............(Equation 1)

Now, in our case, \alpha=-230^{\circ}

Therefore, (Equation 1) can be written as:

\theta=n(180^{\circ})+(-1)^n(-230^{\circ})..........(Equation 2)

Now, to find the correct options all that we have to do is replace n by relevant integers and find the values of \theta that match.

For n=2, (Equation 2) gives us: \theta=2\times 180^{\circ}+(-1)^2(-230^{\circ})=360^{\circ}-230^{\circ}=130^{\circ}.

Thus, sin(230^{\circ})=sin(130^{\circ})

Now, we know that: -sin(-50^{\circ})=sin(50^{\circ})

Let n=-1, then:

\theta=(-1)\times 180^{\circ}+(-1)^{-1}(-230^{\circ})=-180^{\circ}+230^{\circ}=50^{\circ}

Thus, sin(-230^{\circ})=-sin(-50^{\circ})

Likewise, sin(-230^{\circ})=sin(50^{\circ})

Only the last option sin(-50^{\circ}) will never match sin(-230^{\circ}) because no integral value of n will ever give \theta=-50^{\circ}

Thus the last option is the correct option.

3 0
3 years ago
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The sum of 3 consecutive integers is 171. what is the first number in this sequence?
NemiM [27]
56 57 and 58 are the three numbers that work
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Eric wants to attend a public four-year university. He estimates that the average cost of one year at this university is $19,500
rjkz [21]
325 * 60 = 19500 so 60 months
7 0
3 years ago
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Please helppp why is he right or wrong!!
bagirrra123 [75]

Answer:

We cannot agree with Andre because x = 3.

Step-by-step explanation:

Assuming the diagram is a weighing scale which can also be represented as an equation having two sides that is balanced. We can express the situation as follows using equation:

x + 2 = 5

Solve for x

x + 2 - 2 = 5 - 2 (subtraction property of equality)

x = 3

If you plug in the value of x on the diagram given, the scale becomes balance on each side.

Therefore, x = 3. Andre is wrong and we cannot agree with Andre.

7 0
3 years ago
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