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Mamont248 [21]
3 years ago
12

Please help with this too!

Mathematics
1 answer:
expeople1 [14]3 years ago
3 0

Answer:

b>1

Step-by-step explanation:

3(3b-4)> 8b-11\\9b-12> 8b-11\\9b-8b> -11+12\\b> -11+12\\b>1

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Given the cosine equation y = 2cos(4x) - 1, What is the midline?
pogonyaev

Answer:

y = 2 \cos(4x)  - 1 \\ when \: y = 0 \\  \cos(4x)  =  \frac{1}{2}  \\ 4x = 60 \\ x = 15 \\ when \: x = 0 \\ y = 2 - 1 = 1 \\ intercepts =  > (15, \: 0) \: and \: (0, \: 1) \\ midpoints : ( \frac{15 + 0}{2} , \:  \frac{0 + 1}{2} ) \\  = (7.5, \: 0.5) \\ gradient =  \frac{1 - 0}{0 - 15}  \\  =  -  \frac{1}{15}  \\ y = mx + c \\ at \: (7.5, \: 0.5) \\ 0.5 =  -  \frac{1}{15}  \times 7.5 + c \\ 0.5 =  - 0.5 + c \\ c = 1 \\  \therefore \: y =  -  \frac{1}{15} x + 1 \\  =  > 15y =  - x + 15

6 0
3 years ago
30% of 60 is what number?<br> A. 15<br> B. 30<br> C. 18<br> D. 40
Dmitriy789 [7]

Answer:

18

Step-by-step explanation:

30x60=1800

1800/100=18

6 0
3 years ago
Read 2 more answers
If :2,- 1 are the two roots of the equation : x2 + a X + b = 0 ,<br>then find the values of a , b​
harina [27]

Step-by-step explanation:

I'm not sure if this correct or not

7 0
3 years ago
How do i divide 4 into 2,425
mash [69]

Answer:

606.25

Step-by-step explanation:

Step 1: D for Divide. How many times will 5 go into 65? ...

Step 2: M for Multiply. You multiply your answer from step 1 and your divisor: 1 x 5 = 5. ...

Step 3: S for Subtract. Next you subtract. ...

Step 4: B for Bring down. ...

Step 1: D for Divide. ...

Step 2: M for Multiply. ...

Step 3: S for Subtract.

3 0
3 years ago
Read 2 more answers
Marie and Jorge are both trying to lose weight. After 3 months they compared their weight loss. Marie’s weight went from 175 to
lina2011 [118]

✺ ・*:.。. .。.:*・゜゚・*☆ Hey There ☆ ・*:.。. .。.:*・゜゚・*☆ ✺

★━━━★━━━★━━━★━━━★━━━★━━━★━━━★━━━★

The answer to this is:

Jorge's weight percent decrease is (190-180)÷190, or amount of change/original amount. Simplified, 10 ÷ 190 = 5.2637157894...%, approximately equal to 5%. The first option is correct. Marie's percent decrease is (175-150)÷175. Simplified, that is 25÷175 = 14.2857142857...%, which is about 14%. The second option is correct. Clearly, we can tell that Marie had the greater percent change, about 14% to about 5%. Also clearly, Jorge did not have the greater percent change, so we can tell Option 4 is wrong. We already know that Jorge's change is about 5% and Marie's is about 14%, so they can't be about 0.5% or about 1.4%. Options 5 and 6 are incorrect. The correct answers are 1, 2, and 3.

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7 0
4 years ago
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