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guapka [62]
3 years ago
13

Write an equation for the following:

Mathematics
1 answer:
inysia [295]3 years ago
7 0

Answer: 3(x+4)=x+18

Step-by-step explanation: Break down the problem. It says three times the sum of a number and 4. You have to add the number and 4 first. Since you're multiplying by 3, put the sum of a number and 4 in parentheses. This equals the same as eighteen more than the number. It set up how it sounds. Add 18 to the number.

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Find the exact solution of -x2 +7x + 5 = 0 by using the Quadratic Formula.
jonny [76]

Answer:

The answer to your question is:

x 1 = -0.65

x2 = 7.65

Step-by-step explanation:

Equation              -x² + 7x + 5 = 0

a = -1

b = 7

c = 5

Quadratic formula     x = -b ±√(b² -4ac) / 2a

                                   x = - 7 ± √(7² -4(-1)(5) / 2(-1)

                                   x = -7 ± √(49 + 20) / -2

                                  x = -7 ± √69 / -2

                                   x = - 7 ± 8.3 / -2

               x1 = -7 + 8.3 / -2                         x2 = -7 -8.3 / -2

               x 1 = -0.65                                  x2 = 7.65

7 0
3 years ago
Joshua Bennett purchased a television for $245.95 with 40.25% down. He will make 6 payments of $25.83 each. What is the total am
brilliants [131]
(245.95×0.4025)+(6×25.83)=253.97

253.97-245.95=8.02

4 0
3 years ago
Read 2 more answers
Which of these functions has an inverse function? Select all that apply.
ElenaW [278]

ANSWER

y=x

y=x³

EXPLANATION

A function, f(x) has an inverse if and only if

f(a) = f(b)   \Rightarrow \: a = b

Thus, the function is one to one.

For y=x or

f(x) = x

f(a) = f(b)   \Rightarrow \: a = b

Hence this function has an inverse.

For the function y=x² or f(x)=x².

f(a) = f(b)   \Rightarrow \:  {a}^{2} =  {b}^{2} \Rightarrow \: a =  \pm \: b

This function has no inverse on the entire real numbers.

For the function y=x³ or f(x)=x³

f(a) = f(b)   \Rightarrow \:  {a}^{3} =  {b}^{3} \Rightarrow \: a = b

This function also has an inverse.

For y=x⁴ or f(x) =x⁴

f(a) = f(b)   \Rightarrow \:  {a}^{4} =  {b}^{4} \Rightarrow \: a =  \pm \: b

This function has no inverse over the entire real numbers.

5 0
3 years ago
Read 2 more answers
Quick question if I had a problem that was sin x = 18.9/20 =.945 how would I inverse sin of both sides ?
Black_prince [1.1K]

Step-by-step explanation:

gabcjxjdjdidifkfdjdjdjdddd

8 0
3 years ago
What is the word form of the decimal 0.24
n200080 [17]
Twenty four hundredths
7 0
3 years ago
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