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adoni [48]
3 years ago
15

Which of these is the algebraic expression for "nine less than some number?"

Mathematics
2 answers:
ddd [48]3 years ago
8 0
The answer is D. k-9

Since “some number” isn’t identified it is substituted for a variable (k) and then you just subtract 9
sineoko [7]3 years ago
3 0

Answer:

last one

Step-by-step explanation:

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Work out 140-3^2×(8+4)+6÷2
kiruha [24]

Answer:

140 - 9 (12) + 3

140 - 108 +3

140 - 111

= 29

4 0
2 years ago
A consumer testing service tested whether the average baking time of whole wheat bread in gas ovens was less than the average ba
vichka [17]

Answer:

Part 1) The explanatory variable is the type of oven

It is a categorical variable

Part 2) The response variable is the baking time

It is a quantitative variable

part 3) two-sample z-test for proportions should be used for the test

Step-by-step explanation:

An explanatory variable is an independent variable that is not affected by all other variables. In this experiment, the type of oven is the input variable and it  is not affected by any other variable

A categorical variable is one that has two or more categories without any intrinsic ordering of the categories. The type of oven is either gas or electric, so it is categorical.

A response variable is a dependent variable whose variation depends on other variables. The baking time in this experiment depends on the type of oven used

A quantitative variable is one that take on numerical values.

A two proportion z-test allows you to compare two proportions to see if they are the same. The null hypothesis (H0) for the test is that the proportions are the same. The alternate hypothesis (H1) is that the proportions are not the same.

5 0
3 years ago
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Dmitrij [34]
White her is white b
7 0
3 years ago
Read 2 more answers
A car on a racetrack drove 98 miles in 60 minutes. How far did it drive in 12 minutes? Round the the nearest tenth when necessar
Alborosie

Answer:

19.6 miles in 12 minutes.

Step-by-step explanation:

first take 60, then divide it by 12.

60÷12=5

then take 98 and divide that by 5

98÷5=19.6

3 0
3 years ago
I need help pls pls pls pt.2
Eva8 [605]

Answer:

where is the Worksheet

Step-by-step explanation:

there is no Worksheet

3 0
2 years ago
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