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docker41 [41]
2 years ago
5

Mona's scores on 5 math tests were 83,67, 79, 92 & 70. She needs an average score of 81 to receive a B grade on the report c

ard. What is the lowest score she can obtain on the remaining test before report cards and still receive a B grade?
Mathematics
1 answer:
Alina [70]2 years ago
6 0
Is it multiple choice?

EDIT: The answer is 95.
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At a fabric store, fabrics are sold by the yard. A dressmaker spent $36.35 on 4.25 yards of silk and cotton fabrics for a dress.
vaieri [72.5K]

Given:

The system of equations that represent the constraints for the given situation is

x+y=4.25

16.90x+4y=36.35

To find:

The solution of given system of equations.

Solution:

We have,

x+y=4.25           ...(i)

16.90x+4y=36.35           ...(ii)

Multiply equation (i) by 4.

4x+4y=17           ...(iii)

Subtracting (iii) from (ii), we get

16.90x+4y-(4x+4y)=36.35-17

16.90x+4y-4x-4y=19.35

12.90x=19.35

Divide both sides by 12.90.

x=\dfrac{19.35}{12.90}

x=1.5

Put this value in (i).

1.5+y=4.25

y=4.25-1.5

y=2.75

The solution of system of equations is x=1.5 and y=2.75. It means, the yards of silk are 1.5 and yards of cotton are 2.75.

5 0
3 years ago
Find the roots of the following function:<br><br> y = x2 − 7x − 30
DIA [1.3K]

Answer:

x = 3, −10

Step-by-step explanation:

The roots (zeros) are the x values where the graph intersects the x-axis. To find the roots (zeros), replace y with 0 and solve for x.

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How would you describe the correlation in the data? Explain your reasoning.
OleMash [197]

Answer:

Where is the options

Step-by-step explanation:

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3 years ago
In ADEF, the measure of
MrMuchimi

Answer:

X= 51.71

You can use a protractor

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3 years ago
If a system including the quadratic equation representing the parabola and a linear equation has no solution, which linear equat
marshall27 [118]

9514 1404 393

Answer:

  D.  y=2x+6​

Step-by-step explanation:

The line cannot intersect the parabola if it has a y-intercept greater than 5 and a suitable slope. The only sensible answer choice is ...

  y = 2x +6

7 0
3 years ago
Read 2 more answers
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