<em>when we solve the equation it will become
x</em>² + 9x<em>= 0
now here a = 1 , b = 9 and c = 0
by using quaderatic formula
x = -b +,-</em>√<em>b </em>²<em>- 4ac / 2a ( 2a is divided by all terms )
by putting values
x = - 9 +,</em><em>- </em>√<em>81 / 2(1) ( </em>√<em>81 = 9)</em><em>
x = -9 + 9 / 2 and x = -9 -9 /2
x = 0 and x = -18 /2 = -9
now there are two values for x one is- 9 and other is 0
so we put -9 as the value of x then answer will be zero..</em>
I think it's 10. Hope it helps. Like I am saying I am not 100% sure it is but I still hope it helps
Answer:
well if theres 26 in all and 15 girls then there is 11 boys so the answer is
11:15
brainliest please
Step-by-step explanation:
Using a system of equations, the weight of 5 apples, 2 oranges are 4 bananas is given as follows:
B. 1147 gm.
<h3>What is a system of equations?</h3>
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the variables are:
- Variable x: Weight of an apple.
- Variable y: Weight of an orange.
- Variable z: Weight of a banana.
Considering the data given, the equations are:
From the first equation:
3x = 928 - 5y.
x = 309.33 - 1.667y.
From the second equation:
6z = 1088 - 4y
z = 181.33 - 0.667y
Replacing in the third equation:
5x + 3z = 799
5(309.33 - 1.667y) + 3(181.33 - 0.667y) = 799
10.336y = 12961.64
y = 1291.64/10.336
y = 125 gm.
The other weights are:
- x = 309.33 - 1.667y = 309.33 - 1.667 x 125 = 101 gm.
- z = 181.33 - 0.667y = 181.33 - 0.667 x 125 = 98gm.
The weight of 5 apples, 2 oranges are 4 bananas is:
5x + 2y + 4z = 5 x 101 + 2 x 125 + 4 x 98 = 1147 gm, option B.
More can be learned about a system of equations at brainly.com/question/24342899
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For this case, the first thing we must do is define a variable.
We have then:
x: amount of driveways shoveled on Sunday
y: total amount
We now write the equation that models the problem:
She made $ 143 for the weekend:
From here, we clear the value of x:
Answer:
She shoveled 9 driveways on Sunday
