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]

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≤100 (cents)
and 8x≤100-10
or 8x≤90 and x≤90:8
and x≤11.25
So: How long could you talk on the phone for 1 dollar: it is 11 minute and 15 seconds

6 0

3 years ago

2 Points

Whitepunk [10]

Answer: -1.17

Step-by-step explanation:

I guessed and got it right

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3 years ago

What is 1/8 of 3? What is 3 groups of 1/8? 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:

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3 years ago

What is the answer to 2 3/4a = 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 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: $\sin \left(x-20^{\circ \:}\right)=\sin \left(90^{\circ \:}-x\right)$