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Andreas93 [3]
3 years ago
9

How many real solutions does the equation 2x2 + 9x + 7 = 0 have?

Mathematics
1 answer:
Sveta_85 [38]3 years ago
6 0

Answer:

two solutions

Step-by-step explanation:

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Find x in the equation:<br> x^2 = 16
diamong [38]

Answer:

x=4,-4

Step-by-step explanation:

6 0
2 years ago
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The sum of the measures of two complementary angles exceeds the difference of their measure by 86_. Find the measure of each ang
Bad White [126]

As the sum of two complementary angles = a + b = 90 degree -------(1)

Difference of two complementary angles = a – b

According to question;

The difference of two complementary angles exceed the sume (90) by 86.

So

a – b = 90 – 86 = 4 -------(2)

adding equation (1) and (2);

2a = 90 + 4 = 94

a = 94 / 2 = 47

putting a = 47 in equation (1);

47 + b = 90

b = 90 – 47 = 43

<span>So angle a = 47 and angle b = 43</span>
5 0
4 years ago
A palindrome is a number that reads the same forward and backward. For example. 2442 and 111 are palindromes. If 5-digit palindr
german

Answer:

(E) 27

Step-by-step explanation:

Let the 5 digit palindrome be PQRQP

Since each digit is chosen from 1,2,3 therefore

P can either be 1,2 or 3 which gives us 3 options.

Q can also either be 1,2 or 3 which gives us 3 options

R can either be 1,2 or 3 which also gives us 3 options

So we have 3^3 = 3*3*3

= 27

This means 27 palindromes are possible if they are formed using one or more of the digits, 1, 2, 3.

6 0
3 years ago
Evaluate 39÷(2+1)-2×(4+1)
Arada [10]
I believe the answer is 3. Order of Operations is Parenthesis Exponents Multiplication and Division solve left to right and Addition and Subtraction solve left to right
5 0
4 years ago
How can you verify trigonometric identities?
Thepotemich [5.8K]

Answer:

Consequently, any trigonometric identity can be written in many ways. To verify the trigonometric identities, we usually start with the more complicated side of the equation and essentially rewrite the expression until it has been transformed into the same expression as the other side of the equation.

Step-by-step explanation:

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3 years ago
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