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Elena L [17]
3 years ago
9

Solve for b please help me

Mathematics
2 answers:
Serga [27]3 years ago
7 0
B=7
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I’m just tryna keep it simple u got the answer
BARSIC [14]3 years ago
5 0

Answer:

B = 7 (?)

Step-by-step explanation:

(b + 3) / 5 = 2

5 (b + 3) / 5 = 2 x 5

Simplify it --> b + 3 = 10

b + 3 - 3 = 10 - 3 (subtract 3 from both sides)

B = 7

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Solve the simultaneous equations<br> -x + 4y = 12<br> x + y = - 7
blondinia [14]

Answer:

y = 1, x = - 8

or

(-8, 1)

Step-by-step explanation:

-x + 4y = 12

x + y = -7

add the equations together

0x + 5y = 5

5y = 5

y = 1

substitute y for 1 in one of the original equations to find x

x + y = -7

x + 1 = -7

x + 1 - 1 = - 7 - 1

x = - 7 - 1

x = -8

7 0
3 years ago
Suppose we roll a fair six-sided die and sum the values obtained on each roll, stopping once our sum exceeds 285. Approximate th
OlgaM077 [116]

Answer:

1

Step-by-step explanation:

Probability is given by number of possible outcomes ÷ number of total outcomes

Assuming we stop rolling the six-sided die once our sum is 290 ( exceeds 285)

Number of possible outcomes = 75, number of total outcomes = 290

Probability (75 rolls are needed to get this sum) = 75/290 = 0.259

Probability (more than 75 rolls are needed to get this sum) = 1 - 0.259 = 0.741

Probability (at least 75 rolls are needed to get this sum) means that either 75 rolls or more than 75 rolls are needed to get this sum = 0.259 + 0.741 = 1

4 0
3 years ago
F(x) = –2x – 15<br> g(x) = 2x² + 3x + 3<br> Find: (fxg)(x)
Katyanochek1 [597]

Answer: 47? 89? Idek Fr Fr

Step-by-step explanation:

I just want points.

6 0
3 years ago
Multiply or divide as indicated. Y^-9•y^-8•y^10
BabaBlast [244]

Answer:

1 / y^7

Step-by-step explanation:

Y^-9•y^-8•y^10

= y^10 / y^9•y^8

= y^10 / y^17

= 1 / y^7

8 0
3 years ago
Otto invests $1,000 at age 20. Otto wants theinvestment to be worth $4,000 by age 30. Ifinterest is compounded continuously, wha
AveGali [126]
r\approx0.139

1) Since this is a Continuously Compounded operation in a 10 yrs period, then we can write out the following equation:

\begin{gathered} A=Pe^{rt} \\  \end{gathered}

2) Plugging into the equation the given data and since Otto is 20 yrs old and he plans to get $4,000 in ten years, we can write out:

\begin{gathered} 4000=1000e^{\mleft\{10r\mright\}} \\ \frac{4000}{1000}=\frac{1000e^{10r}}{1000} \\ 4=e^{10r} \\ \ln (4)=\ln (e)^{10r} \\ 10r=\ln (4) \\ r=\frac{\ln (4)}{10} \\ r=0.1386 \end{gathered}

3) Thus the rate Otto needs is

r=0.1386\approx0.139

Note that since the 0.1386 the six here is greater than 5 then we can round up to the next thousandth, in this case: 0.139. For the 0.1386 is closer to 0.139 (0.004) than to 0.138 (0.006).

Or 13.9%

8 0
1 year ago
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