C= 10h+20
The cost of a grandmother accounts for at most $30 in the cost of each quilt;
B for a single quilt, the cost of grandma is 20 yuan more than the cost of raw materials;
C Grandma's hourly cost when sewing the quilt is $10;
Grandma d spends $65,438+00 sewing a quilt.
The answer should be C.
Select digital data representation
Box diagram; Scatter chart; C pie chart D tree chart (stem leaf chart) E line chart F block chart G histogram
Use:
Used to compare grouped data.
Used to display the data coordinates of each numerical value, forming different intervals respectively.
Used to show the relationship between two sets of data.
It is used to show how data values change over time.
Used to indicate that the whole is divided into several parts.
fill (up) a vacancy
Pythagorean Theorem of Perfect Square Exponential Rational Numbers
Operation sequence reflection square root translation rotation
According to the operation sequence of Pythagoras' law, the perfect mapping between the square exponent and the square root of rational number is realized.
All positive real numbers have two (square tool). All positive numbers have two square roots.
_ _ Exponent _ _ indicates the number of times the radix is used as a factor. This index shows the number of times the radix is used.
A number whose square root is an integer is called a square power rational number. Numbers whose square roots are integers are called square exponential rational numbers.
The rational number _ _ _ _ can be written as the quotient of two integers.
A rational number can be written as the quotient of two integers.
The three types of transformations that can be performed on an object are _ _ _ _ _ _ (sliding), _ _ _ _ _ (flipping) and _ _ _ _ _ _ _ (rotating).
The three combinations that can be realized on the same object are shift, flip and conversion.
Evaluating expressions in grouping symbols is the first step of _ _ _ _ _ _ _ calculation. Finding the expression in the combination symbol is the first step of calculation.
The relationship between the side lengths of right-angled triangles described in the equation
Write the equation of the relationship between the sides of a right triangle: c 2 = a 2+b 2.