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GenaCL600 [577]
3 years ago
11

Solve the equation x^2-7=14-2x^2

Mathematics
1 answer:
Katena32 [7]3 years ago
6 0
X^2+2x^2=14+7
3x^2=21
x^2=7
x=±√7
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Maria's book is longer than Brandon's. The difference in the two book lengths is 56
Bingel [31]

Answer:

Maria's book is 202 pages long, Brandon's book is 146 pages long

Step-by-step explanation:

We can set this up with 2 variables: lets say that Maria's book length is x and Brandon's is y.

We can see that Maria's book is 56 pages longer than Brandon's and can come up with an equation:

x=y+56

We also see that their booklengths add up to 348, and can get:

x+y=348

From here, we solve for x and y. We can use substitution to find y.

x+y=348

(y+56)+y=348

2y=292

y=146

Here we plug in for x:

x=y+56

x=(146)+56

x=202

Therefor we get that Maria's book is 202 pages long, Brandon's book is 146 pages long

7 0
2 years ago
Find the value of x ​
givi [52]

Answer:

110°

Step-by-step explanation:

In triangle AOB

OA = OB (radii of same circle)

m\angle OAB = m\angle OBA =20\degree

m\angle AOB = 180\degree - (20\degree +20\degree)

m\angle AOB = 180\degree - 40\degree

m\angle AOB = 140\degree

m\widehat {ACB} =m\angle AOB = 140\degree

(measure of minor arc is equal to corresponding central angle)

x\degree = \frac{1}{2} (360\degree - 140\degree)

(inscribed angle theorem)

x\degree = \frac{1}{2} \times 220\degree

\huge\purple {x = 110}

3 0
3 years ago
Lena ran for president of the chess club, and she received 24 votes. There were 30 members in the club. What percentage of the c
zhannawk [14.2K]

Answer:

It is 80 percent. i had this question and got it right. Have a great day

Step-by-step explanation:

3 0
3 years ago
I need help with those 2
galina1969 [7]
Question 7 is a, multiply ever number by 5
question 8 is also a, multiply every number by -2
7 0
3 years ago
Addition (must show work) can someone solve 1. m + 13 =29 2. z + x =34 <br><br> 3. 87 + p = 136
azamat

Greetings ! Your Answer Is Below.

Answer;

1. m = 16

2. x = -z + 34 or z = -x + 34

3. p = 49

Step-by-step explanation;

1. m + 13 - 13 = 29 - 13       | Subtract 13 from both sides ( m = 16 )

2. - z + 34                          | Add -z to both of the sides ( x = - z + 34 )

Or - x + 34                         | Add -x to both of the sides ( z = - x + 34 )

3. 136 - 87 = 49                 | Subtract 87 from both sides ( p = 49 )

[ Hope This Helped ! ]

3 0
3 years ago
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