What it's the value of the expression 8 times 9-7+4 times 5

Answers

Answer 1

Answer: 8 times 9 - 7 + 4 times 5

Use PEMDAS. Parentheses, Exponent, Multiply, Divide, Add, Subtract

Multiply:
8 times 9 = 72
4 times 5 = 20

72 - 7 + 20

Add:
72 + 20 = 92

Subtract:
92 - 7 = 85

8 times 9 - 7 + 4 times 5 is equal to 85.

Answer 2

Answer: The answer is 85 because you have to use PEMDAS

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solve the equation 5 x - 14 = x - 7. in your final answer, be sure to state the solution and include all of your work.

Answers

5x-14=x-7
+14 +14

5x=x+7
-x -x

4x=7
/4 /4

x=1.75

What is the value of f(-4) in the piecewise function f(x)= -x-5 for -5<= x <= -2; -x^2+1 for -2<=x<=2; (x-3)^2+2 for 2<=x<=4? If that makes any since

Answers

Answer:

The value for f(-4) in the piecewise function is -1

Step-by-step explanation:

As the function is defined by pieces we must choose the correct interval when replacing. In this case, the value of the function needs to be calculated in x=4.

This value of x is within the interval:

-5<=x<=-2

Therefore we replaced in the corresponding expression:

f(x)=-x-5

f(-4)=-(-4)-5=-1

Take into account this case is not particularly a function since, for example, in the value of x=-2 the expression can take two values corresponding to two different pieces. The obtained result is only valid in the range for -5<=x<=-2.

We first need to pick the correct piece to use. In this case, we will use f(x) = -x-5 because -5<=-4.

Then, we use direct substitution:
f(-4) = -(-4) - 5
f(-4) = -1

Solve graphically the inequality 2x + y >= 2

Answers

Answer:

y>=2-2x

Step-by-step explanation:

hope this helps

The first term of an arithmetic sequence is 4 and the fifth term is 16. What is the nth term of the sequence?A.
4n
B.
3n + 1
C.
5n – 1
D.
4n + 1

Answers

aruthmetic
an=a1+d(n-1)
a1=4
5th is 16
a5=4+d(5-1)=16
16=4+d(4)
minus 4
12=d(4)
divide 4
3=d

an=4+3(n-1)
an=4+3n-3
an=4-3+3n
an=1+3n

B is ansres

If the 5th term is stated, all you need to do is plug in 5 for the n value, as it represents the 5th term. The only equation that holds true for the 5th terms being 16 is B. 3n+1
1st term = 3(1)+1 = 4
2nd term = 3(2) +1 = 7
3rd term = 3(3) +1 = 10
4th term = 3(4) +1 = 13
5th term = 3(5)+1 = 16

Correct answer is B. 3n+1

The regular octagon has a perimeter of 122.4 cm. Which statements about the octagon are true? Check all that apply.