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notsponge [240]
2 years ago
12

Need help 20 points please

Mathematics
1 answer:
Serjik [45]2 years ago
6 0
The answer is C. 3√2x+5=5 and x is equal to 60
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Which is the last operation performed when evaluating (8 minus 2 x) squared + 4 for x = 3?
kompoz [17]

Answer:

addition

Step-by-step explanation:

The given expression is (8-2x)^2+4

We want to determine the last operation performed when evaluating this expression for x=3.

We substitute to get:

(8-2*3)^2+4

Multiply within the parenthesis to get:

(8-6)^2+4

Subtract to get:

2^2+4

Evaluate the exponent to get:

4+4

Add to obtain:

8

Hence the final operation is addition

4 0
3 years ago
Read 2 more answers
What are the roots of the equation x^2+6x-9=0
Mila [183]

Answer:

x = approx. 1.24 or -7.24

Step-by-step explanation:

It's hard to factor directly so we should use the quadratic formula or complete the square. I'm going to go with completing the square.

x²+6x-9=0

x²+6x=9

x²+6x is the same as x²+2·3·x, in order to make this into the algebraic identity (A+B)²=A²+2AB+B², we must add B², or in this case 3² to both sides. (A is x, B is 3)

x²+6x+9=18

(x+3)²= 18

x+3= ±√18

x= ±4.24 -3 (approximately 4.24)

First solution for  x = 4.24-3 = 1.24

Second solution for x = -4.24-3 = -7.24




4 0
3 years ago
Maya spent her allowance on playing an arcade game a few times and riding the Ferris wheel more than once.
goldfiish [28.3K]
<span>To write a two-variable equation, you would first need to know how much Maya’s allowance was. Then, you would need the cost of playing the arcade game and of riding the Ferris wheel. You could let the equation be cost of playing the arcade games plus cost of riding the Ferris wheel equals the total allowance. Your variables would represent the number of times Maya played the arcade game and the number of times she rode the Ferris wheel. With this equation you could solve for how many times she rode the Ferris wheel given the number of times she played the arcade game.</span>
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What is the area, in square inches, of the rectangle below?
chubhunter [2.5K]
The answer would be D i believe
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2 years ago
Why the product (−5)(−4) must be equal to 20.
KengaRu [80]

Answer:

Multiplying to negative numbers equals a positive answer.

Step-by-step explanation:

7 0
2 years ago
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