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balu736 [363]
3 years ago
9

Which phrase matches the algebraic expression below 2(x-7)+10

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
8 0

Answer:

The sum of a number and 7 multiplied by 2 is increased by 10

Step-by-step explanation:

zubka84 [21]3 years ago
7 0
The sum of a number 7 multiplied by 2 then is increased by 10
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Brainliest and points !! ANSWER ASAP !!
Igoryamba

Answer:

Step-by-step explanation:

The sum of the ages of a Mother and her son is 78 , three years ago the mother is five times as old as the son, what is their present ages?

To solve this , let the age of the mother be x and the age of the son be y , from the first statement :

x + y = 78

Three years ago , the mother will be x- 3 and the son will be y - 3 , from the second statement:

x - 3 = 5 ( y-3)

x- 3 = 5y - 15

x - 5y = -12

The resulting equations are

x + y = 78

x - 5y = -12

This is called a simultaneous linear equation , that means it is a linear equation.

The side of a square is xcm , if the difference between the area and the perimeter is 12 , find the legth of its side.

Interpretation:

The formula for the area of a square is l^{2} and the perimeter is 4l , from the question , we have

x^{2} - 4x = 12

This is not a linear equation , it is simply a quadratic equation , so the situation is non linear

5 0
3 years ago
Scale factor of 3 and 6
GenaCL600 [577]

Answer:

3:6

3x2=6

Scale factor = 2

Step-by-step explanation:

3 0
3 years ago
Harper scores 24 points per coin. In all, how many coins does Harper have to collect to
Mrac [35]

Answer:

2 coins

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Student had 500 milliliters of water in a water bottle. She drank 25% of the water before soccer practice. After practice, she d
sesenic [268]
250 milliters of water remains
8 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
2 years ago
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