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Alla [95]
3 years ago
11

Add. −1.4+(−1.2) Enter your answer, as a decimal, in the box.

Mathematics
2 answers:
Natasha_Volkova [10]3 years ago
4 0
Simplify the number -15
kozerog [31]3 years ago
3 0
Simplify the expression = -2.6
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juila has 3 1/2 pounds of dog food.she has to slit it quality among her 7 dogs how much food will each dog receive
azamat
1/2 a pound per dog
3 1/2=3.5lbs
3.5÷7=.5
.5=1/2
3 0
3 years ago
Find the value of the variables in each figure. Explain your reasoning.
sergiy2304 [10]

Answer:

see explanation

Step-by-step explanation:

The figure has one pair of parallel sides and is a trapezoid.

Each lower base angle is supplementary to the upper base angle on the same side, thus

15x + 30 + 10x = 180 , that is

25x + 30 = 180 ( subtract 30 from both sides )

25x = 150 ( divide both sides by 25 )

x = 6

Also

3y + 18 + 90 = 180 , that is

3y + 108 = 180 ( subtract 108 from both sides )

3y = 72 ( divide both sides by 3 )

y = 24

-------------------------------------------------------------------

2x, 90 and x lie on a straight line and sum to 180 , thus

2x + 90 + x = 180 , that is

3x + 90 = 180 ( subtract 90 from both sides )

3x = 90 ( divide both sides by 3 )

x = 30

------------

2y and x are alternate angles and congruent , thus

2y = x = 30 ( divide both sides by 2 )

y = 15

4 0
3 years ago
HELP HELP HELP HELP <br><br> What is the equation of the trend line in the scatter plot ?
ivann1987 [24]
The answer to this scatter plot question is y=1/3x-9
3 0
3 years ago
Suppose you want to estimate the proportion of polydactyl cats (cats with extra toes). You sample 419 randomly selected cats, an
german

Answer:

No. When all you want to do is estimate a population parameter, you should construct a confidence interval.

Step-by-step explanation:

In this case, there is no other prior estimation about the population to test (a hypothesis to nullify). The only thing you can do is construct a confidence interval of the proportion, where the standard deviation can be calculated in function of the proportion and the sample size.

The right answer is E: "No. When all you want to do is estimate a population parameter, you should construct a confidence interval."

6 0
3 years ago
Use a calculator to find the value of the trigonometric function to four decimal places. Tan 3.4??? A.0.2555 B.0.0594 C.0.9668 D
r-ruslan [8.4K]
The value of Tan 3.4 is 0.059410947 rounded off to four decimal places would equal to 0.0594, letter B. This is your answer if your calculator is in the degree mode. 

Tangent or Tan is one of the trigonometry functions. It represents TOA in the sohcahtoa mnemonic which means Tan = Opposite / Adjacent 
7 0
3 years ago
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