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Oxana [17]
3 years ago
11

Consider that (x, y) is a solution to the system of equations. What is the product of x and y? 2x − 5y = 10 4x + 3y = 7 A) − 5 2

B) −1 C) − 2 5 D) 1
Mathematics
1 answer:
adelina 88 [10]3 years ago
4 0
2x=10+5y

sub in for 4x

20+10y+3y=7

D)-1
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Stella can type 150 words in 5 minutes. What is her rate per minute?
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Answer: Stellas rate per minute is 30 words per minute

Step-by-step explanation:

7 0
4 years ago
The sum of two trinomials is 6x2 − 5x + 4. If one of the trinomials is 4x2 + 3x − 2, then what is the other trinomial?
Vadim26 [7]
Subtract the known trinomial from the total sum:

6x2 - 5x + 4 - 4x2 + 3x - 2 = 2X^2 -8x +6
I hope this helps :)
6 0
2 years ago
Find the line y=a+bx which best approximates the data points
Vika [28.1K]

Answer:

y = 11.84x - 32.71

Step-by-step explanation:

Here, the given data points,

(−3,−70),(−1,−42),(1,−21),(2,−9),(4,14),

Let x represents the input value and y represents the output value,

So, the table that represents the given situation is,

x         -3            -1             1             2             4

y       -70          -42         -21         -9             14

By the above table,

\sum x=3

\sum y=-128

\sum xy = 269

\sum x^2=31

\sum y^2 = 7382

Let the equation of the line is,

y = bx + a

Where,

a=\frac{\sum y \sum x^2 - \sum x\sum xy}{n(\sum x^2)-(sum x)^2}

b=\frac{n\sum xy - \sum x \sumy}{n(\sum x^2)-(\sum x)^2}

n = number of data points = 5,

By substituting the values we get,

a = - 32.70547945 ≈ - 32.71,

b = 11.84246575 ≈ 11.84,

Hence, the equation of line would be,

y = 11.84x - 32.71

8 0
3 years ago
Please help i need this grade​
Arlecino [84]
C... all are correct
7 0
3 years ago
Use substitution to solve the system equation.<br><br><br> n=3m-11<br><br> 2m+3n=0
prohojiy [21]

Answer:

m = 3, n = -2.

Step-by-step explanation:

Substitute n = 3m - 11 in the second equation:

2m + 3(3m - 11) = 0

2m + 9m - 33 = 0

11m = 33

m = 3.

Substitute for m in n = 3m-11:

n = 3(3) - 11

n = -2.

6 0
3 years ago
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