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3 years ago

Help me this is very hard

Mathematics

1 answer:

guapka [62]3 years ago

4 0

Answer:

B. 60

Step-by-step explanation:

1. take the square root of 64

2. multiply 8*10 and 5*4

3. subtract

Square root of 64 is 8 so,

10*8 - 5*4

80 - 20 =

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hram777 [196]

Answer:

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3 years ago

Maritza remembers her PIN because it is between 1,000 and 1,500 and it is the product of two consecutive prime numbers. What is

valentina_108 [34]

Answer:

Step-by-step explanation:

<u>Prime numbers</u>

These are integer numbers that only divide exactly by themselves and by 1. To find the first possible prime number between 1,000 and 1,500, calculate the square root of 1,000.

$\sqrt{1000}\approx 31.6$

Thus, the first prime to consider is 31. Write the consecutive primes from 31:

31 , 37 , 41 , 43

We can see the only two consecutive primes whose product lies in the given interval are 31 and 37. Thus, the PIN is 31*37=1147

4 0

3 years ago

Solve the equation. 3/4(x-12)=3 –12 9 16 20

tekilochka [14]

Answer:

Step-by-step explanation:

³/₄(x - 12) = 3 {multiply both sides by ⁴/₃}

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x = 16

8 0

3 years ago

Which quadratic function in vertex form has a vertex at (−5 , −4) and passes through the point (−2 , −1)?

ioda

Answer:

y = 1/3(x + 5)^2 - 4

Step-by-step explanation:

The general vertex form is;

y = a(x-h)^2 + k

From the question, (h,k) are the coordinates of the vertex which is (-5,-4)

So we have

y = a(x + 5)^2 -4

So we need to get the leading coefficient

Simply substitute the point it passes through

x = -2 and y = -1

-1 = a(-2 + 5)^2 - 4

-1 = a(3)^2 -4

-1 = 9a -4

9a = 4-1

9a = 3

a = 3/9

a = 1/3

So the equation is;

y = 1/3(x + 5)^2 - 4

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3 years ago

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vichka [17]

Answer:

Step-by-step explanation:

Area=w*h

w*h=(2h)*(h)=2h^2

dA/dt=2(2h)=4h

dA/dt=4h dh/dt in^2/sec

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4 years ago