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Delicious77 [7]
3 years ago
14

Help ASAP !’please explain

Mathematics
1 answer:
patriot [66]3 years ago
4 0

Answer:

First one is 15.Second one is 3

Step-by-step explanation:

1 inch:10 meters 150÷10:15 26÷2:13 6÷2:3

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The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that. How long could you talk o
Lunna [17]
<span>The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that. 
We call x minute to talk after the first minute.
We have 10+8x</span>≤100 (cents)
and 8x≤100-10
or 8x≤90 and x≤90:8
and x≤11.25
So: <span>How long could you talk on the phone for 1 dollar: it is 11 minute and 15 seconds</span>
6 0
3 years ago
2 Points
Whitepunk [10]

Answer: -1.17

Step-by-step explanation:

I guessed and got it right

7 0
3 years ago
What is 1/8 of 3?<br> What is 3 groups of 1/8?<br> How many 3's are in 1/8?
zimovet [89]

Answer:

0.375 is 1/8 of 3. 3 groups of 1/8 is 3/8. 0 3's are in 1/8.

Step-by-step explanation:

8 0
3 years ago
What is the answer to 2 3/4a =<br> 19 1/4
sukhopar [10]

Convert the mixed numbers to the improper fractions:

2\dfrac{3}{4}=\dfrac{2\cdot4+3}{4}=\dfrac{11}{4}\\\\19\dfrac{1}{4}=\dfrac{19\cdot4+1}{4}=\dfrac{77}{4}

2\dfrac{3}{4}a=19\dfrac{1}{4}\\\\\dfrac{11}{4}a=\dfrac{77}{4}\qquad\text{multiply both sides by 4}\\\\\not4^1\cdot\dfrac{11}{\not4_1}a=\not4^1\cdot\dfrac{77}{\not4_1}\\\\11a=77\qquad\text{divide both sides by 11}\\\\\boxed{a=7}

5 0
4 years ago
Solve for x<br><br> sin(x-20) = cos(x)
tatuchka [14]

Answer:

x=\frac{6480^{\circ \:}n+1980^{\circ \:}}{36}

x=\frac{36\pi n+11\pi }{36}

Step-by-step explanation:

We can use the identity: \cos \left(x\right)=\sin \left(90^{\circ \:}-x\right) to simplify this into:\sin \left(x-20^{\circ \:}\right)=\sin \left(90^{\circ \:}-x\right)

The identity sin(x) = sin(y)  -->  x=y+2\pi n,\:x=\pi -y+2\pi n, can be used to simplify this further:

x-20^{\circ \:}=90^{\circ \:}-x+360^{\circ \:}n    (Add 20 to both sides)

x=-x+360^{\circ \:}n+110^{\circ \:}    (Add x to both sides)

2x=360^{\circ \:}n+110^{\circ \:}    (Divide both sides by 2)

\frac{2x}{2}=\frac{360^{\circ \:}n}{2}+\frac{110^{\circ \:}}{2}    (Simplify)

x=\frac{6480^{\circ \:}n+1980^{\circ \:}}{36}    If required, we can convert this into radians:

x=\frac{36\pi n+11\pi }{36}

7 0
3 years ago
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