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sladkih [1.3K]
3 years ago
13

HELLPPPPP!! i need help with this taking a test

Mathematics
1 answer:
vivado [14]3 years ago
3 0

Answer:

trapezoid

Hope help

Pls mark brainliest if it is a right answer

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Solve 2x + 5y = 20; 3x - 10y = 37 by elimination. How do you do this? Thank-you!
mr Goodwill [35]

\left\{\begin{array}{ccc}2x+5y=20&\text{multiply both sides by 2}\\3x-10y=37\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}4x+10y=40\\3x-10y=37\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad7x=77\qquad\text{divide both sides by 7}\\.\qquad\boxed{x=11}\\\\\text{Put the value of x to the first equation:}\\\\2(11)+5y=20\\\\22+5y=20\qquad\text{subtract 22 from both sides}\\\\5y=-2\qquad\text{divide both sides by 5}\\\\\boxed{y=-\dfrac{2}{5}}\\\\Answer:\ \boxed{x=11\ and\ y=-\dfrac{2}{5}}

6 0
2 years ago
Multiples of 4 are even numbers
Vesna [10]

Answer:

The statement is true

Step-by-step explanation:

Multiples of 4 (until 40): 4 , 8 , 12 , 16 , 20 , 24 , 28 , 32 , 36 , 40

All of these are even numbers

4 0
2 years ago
Read 2 more answers
Help me with this problem
svlad2 [7]

Answer:

Angle A is F Angle A = 57. 52+71=123. 180-123=57

3 0
3 years ago
10.) Fishermen have been studying how the number of dead sea turtles in the local bay is related to the pollution index of the b
alexdok [17]

Answer:

Step-by-step explanation:

A linear function is a polynomial function of the first degree that has the form:

f (x) = m*x + b   or  y=m*x + b

where y is the dependent variable, x is the independent variable, m is the slope of the line and b is the intercept with the Y axis.

The slope m measures the inclination of the line with respect to the abscissa axis, that is, the x axis.  According to the value of the slope m, the linear function can be increasing if m> 0, decreasing if m <0 or constant if m = 0.

You know that the number of sea turtle deaths per year is modeled by f(x) = 13.42x + 109.118.   Then the value of the slope is 13.42. In this scenario, the slope indicates that the number of deaths of sea turtles grows in a proportion of 13.42 with respect to the pollution index of the bay.

5 0
3 years ago
Complete the comparison: 3 + 7 &gt; ? A. 8 + 2 B. 10 − 2 C. 7 + 3 D. 9 + 4
Dafna1 [17]
3 + 7 > 10 - 2
10 > 8...correct
5 0
3 years ago
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