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ruslelena [56]
3 years ago
7

Evaluate the following numerical expression 2+(-3)+7

Mathematics
1 answer:
zlopas [31]3 years ago
6 0

Answer:

Step-by-step explanation:

2 + (-3) + 7 = 2 - 3 + 7 = 9 - 3 = 6 <==

a positive multiplied by a negative will be negative

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Look at the graph shown<br> Which equation best represents the line?
Brilliant_brown [7]

y=\frac{11}{4}x +4 is the equation best represents the line.

Solution:

Take any two points on the line.

Let the points be (0, –4) and (4, 7).

x_1=0,y_1=-4,x_2=4, y_2=7

General form of equation of a line is y = mx + c

where m is the slope and c is the y-intercept of the line.

<em>y-intercept is the point which line crosses at y-axis.</em>

In the given line, y-intercept is 4.

c = 4

Slope of the line:

$m=\frac{y_2-y_1}{x_2-x_1}

$m=\frac{7-(-4)}{4-0}

$m=\frac{11}{4}

Equation of the line:

y = mx + c

y=\frac{11}{4}x +4

Hence y=\frac{11}{4}x +4 is the equation best represents the line.

5 0
3 years ago
Special right traingles (30, 60, 90<br> 45, 45, 90
igor_vitrenko [27]

Answer:

30

Step-by-step explanation:

3 0
4 years ago
A research team is testing a product that will minimize wrinkles among women. Volunteers in the age group of 40 to 45 are includ
artcher [175]

There are mistakes in the answer options attached. These are the correct ones.

a. The group that received the bottle of solution is the control group.

b. The group that received the bottle of solution that did not contain the ingredients that are meant to lessen wrinkles is the control group.

c. Both the groups are control groups.

d. Neither group is an control group.

Answer:

B. The group that received the bottle of solution that did not contain the ingredients that are meant to lessen wrinkles is the control group

Step-by-step explanation:

In an experiment of this type, the control group is the group that does not contain the treatment. So in this group The effect of the treatment unknown unlike the experimental group which gets the treatment that the researcher is trying to find it's effect.

I. Conclusion, the group that got bottles that did not contain Ingredients for wrinkles lessening is the control group.

4 0
3 years ago
A livestock pen is built in the shape of a rectangle that is 2 times as long as it is wide. the perimeter is 42 feet. if the mat
Lorico [155]
Let width = x ft  then 
2x + 2(2x) = 42
6x = 42
x = 7 

so the width is 7 ft and length is 14 ft.

So the cost to build the pen =  14*1.25 + 14*1,25 + 7*2.50 + 7*2.50
=  70  answer
4 0
3 years ago
Can someone help me out with the first 3 please
disa [49]

Answer:

I got chu

Step-by-step explanation:

3 is 105

2 is 65

1 is not sure bout dat oneee

Hope i helped Brainliest is appricated ill try and figure out 1

3 0
3 years ago
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