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Zolol [24]
3 years ago
7

By rounding to 1 significant figure, estimate the value of 48.7 x 61.2 11.3

Mathematics
1 answer:
11111nata11111 [884]3 years ago
7 0

Answer : 263

Rounded (1 s.f ) = 300

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Please help!<br><br> If sin(xº)=cos(yº) find k if x=2k+3 and y=6k+7
USPshnik [31]

answer

10

step-by-step explanation

the equation given is sin(x) = cos(y) with x = 2k + 3 and y = 6k + 7

substitute in 2k+ 3 for x in sin(x) and substitute in 6k + 7 for y in cos(y)

sin(x) = cos(y)

sin(2k + 3) = cos(6k + 7)

we know that sin(x) = cos(90 -x)

sin(2k + 3)

= cos(90 - (2k + 3) )

= cos(90 - 2k - 3)

= cos(87 - 2k)

substitute this into the equation sin(2k + 3) = cos(6k + 7)

sin(2k + 3) = cos(6k + 7)

cos(87 - 2k) = cos(6k + 7)

87 - 2k = 6k +7

80 = 8k

k = 10

7 0
3 years ago
How many faces does a square pyramid have? three four five six
andrew-mc [135]

Answer:

5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Solve this inequality 3q - 6 &gt; 21
erica [24]
3q - 6 > 21

3q > 27

q > 9
6 0
3 years ago
Read 2 more answers
Guys pls help me im failing my grade and i really need help plsssss and dont do it for the points
Nataliya [291]

Answer:

simplified:  \frac{3}{5}

unsimplified:  \frac{12}{20}

Step-by-step explanation:

Since the fractions have the same denominator, all we have to do is subtract the numbers in the numerator:

15 - 3 = 12

The difference of the two fractions is \frac{12}{20}. To simplify this answer, divide both the numerator and the denominator by 4:

12/4 = 3

20/4 = 5

The difference in simplified form is \frac{3}{5}.

I hope this helps. :)

6 0
3 years ago
The quotient of b and 2 minus 4 is at least 26. I need this ASAP
Pavlova-9 [17]

For this case we must express the following expression algebraically:

<em>"The quotient of b and 2 minus 4 is at least 26"</em>

So we have to:

The quotient of b and 2 minus 4, is represented as:\frac {b} {2-4}

We have different signs subtracted and the sign of the major is placed:

\frac {b} {- 2}

Thus, the expression is written as:

\frac {b} {2-4} \geq26\\\frac {b} {- 2} \geq26\\- \frac {b} {2} \geq26

ANswer:

\frac {b} {2-4} \geq26

3 0
3 years ago
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