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Debora [2.8K]
2 years ago
14

I need help asap please? and this is for math? what is 4-5+8x8/4?

Mathematics
2 answers:
aleksandr82 [10.1K]2 years ago
5 0

15.75

Step-by-step explanation:

4-5 = -1

8*8 is 64 so

instead of adding

you do add a line change the sign of the equation

64- (-1) = 63

63/4 = 15.75

hope this helps

Zanzabum2 years ago
3 0

Answer:

the answer is 50 hope this helps

Step-by-step explanation:

4-5=-1

-1+8=7

7+8x8= ?

15x8=120

120/4=50

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The variable, y, varies directly with x. If y = 26 when x = 21,<br> what is y when x = 64?
STatiana [176]

Answer:

y=69

Step-by-step explanation:

first step:when y=26 and x=21

c=y-x

c=26-21

c=5

second step: when y is unknown and x=64

To find y we simply add the value of c to x

y=x+c

y=64+5

y=69

6 0
3 years ago
Which of the following is the complete list of roots for the polynomial function f(x)=(x^2+6x+8)(x^2+6x+13)
MrMuchimi

Answer:

<h2>x = -4 or x = -2</h2>

Step-by-step explanation:

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8 0
3 years ago
A rectangle is 1/2 ft long and 3/4 ft wide.
Alex17521 [72]
Area = Length * Width
A = 1/2 * 3/4
A = 3/8

In short, Your Answer would be 3/8 Ft^2

Hope this helps!
8 0
3 years ago
Read 2 more answers
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GarryVolchara [31]

Answer:1 r3

Step-by-step explanation:8 Divided by five

4 0
3 years ago
Compound interest In Exercise,$3000 is invested in an account at interest rate r,compounded continuously.Find the time required
xenn [34]

Answer:

(a) 8.15

(b) 12.92

Step-by-step explanation:

Given: P = $3000, r = 0.085

                A = Pe^{rt}

Where

A is the Amount

P is the Principal

r is the rate

t is the time

(a) For the amount to double, A = 2 × P

               A = 2 × $3000

               A = $6000

               6000 = 3000e^{0.085t}

               \frac{6000}{3000} = e^{0.085t}

               2 = e^{0.085t}

Take log_{e} of both sides

               log_{e}2 = log_{e}e^{0.085t}

But log_{e}e = 1

            ∴ ln2 = 0.085t

               t = \frac{ln2}{0.085}

               t = \frac{0.693}{0.085}

               t = 8.15

(b) For the amount to double, A = 3 × P

               A = 3 × $3000

               A = $9000

               9000 = 3000e^{0.085t}

               \frac{9000}{3000} = e^{0.085t}

               3 = e^{0.085t}

Take log_{e} of both sides

               log_{e}3 = log_{e}e^{0.085t}

But log_{e}e = 1

            ∴ ln3 = 0.085t

               t = \frac{ln3}{0.085}

               t = \frac{1.0986}{0.085}

               t = 12.92

5 0
3 years ago
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