Solve for r -4(r+6)= -49
1 answer:
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For this case, the first thing we are going to do is assume that all the tests are worth the same.
Then, we define a variable:
x: score of Mona's last test
We write now the inequality that models the problem:
From here, we clear the value of x:
Answer:
the lowest grade that Mona can get for her last test so that her test average is 90 or more is:
x = 87
Then, we define a variable:
x: score of Mona's last test
We write now the inequality that models the problem:
From here, we clear the value of x:
Answer:
the lowest grade that Mona can get for her last test so that her test average is 90 or more is:
x = 87
Answer:
Or, 1/2.
Step-by-step explanation:
To find the slope of a line that crosses any two given points, we can use the slope formula:
Where (x₁, y₁) is our first point, and (x₂, y₂) is our second point.
We will let (6, -7) be our first point (x₁, y₁), and (4, -8) be our second point (x₂, y₂).
Substitute them into the formula. Hence:
Simplify:
Evaluate. Hence, our slope is:
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Answer:
The correct answer is 27.
Step-by-step explanation:
Let's start by analyzing the information we have.
We know that Greta has a piece of clothi that is 9 yards long and has cut it into equal pieces that are 1/3.
Now, to know how many pieces of cloth Greta has, we just have to divide 9 by 1/3.
Remember that to divide fractions, you must multiply crosswise. Under the number 9 there will be a 1 as denominator. Then the division would be as follows:
In this way we should multiply 9 x 3 and 1 x 1, which would give us the following result:
In this way we can verify that the correct answer is 27.