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3 years ago

I NEED HELP PLS HELP ME ASAP!!! I'LL GIVE YOU 100 POINTS!

Mathematics

2 answers:

ryzh [129]3 years ago

6 0

Answer:

189 sq mm

Step-by-step explanation:

area = (21×18)/2 = 189 sq mm

Nina [5.8K]3 years ago

6 0

It’s 189. Half of 18 is 9 and 9 x 21 = 189.

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Which of the following is a zero of the function f(x) = x3 - x2 - 21x + 45.

marin [14]

The zeros are 3 and -5. Hope this helps!

5 0

3 years ago

A researcher is interested in the effect of alcohol consumption on reaction times. Participants are assigned to one of three pos

IRINA_888 [86]

Answer:

The three different possible conditions ;

nonalcoholic beer group, 1 beer group, 2 beer group

Step-by-step explanation:

The Independent variable, also known as the predictor variable are variables used to influence and check changes in the dependent or predicted variable as subjects are exposed to the different types or levels of independent variable used in the study.

In the scenario described above, the predictor or independent variables which are used to measure the reaction times of participants to unexpected variables is the independent variable, beacuse these different variables ; nonalcoholic beer, 2 beer will probably affect the response time of the participants which is the dependent variable.

3 0

3 years ago

-65 plus what equals -113

Firlakuza [10]

Answer:

-178

Step-by-step explanation:

4 0

3 years ago

What is the inverse of p(m) = m/5 + 8

zvonat [6]

The inverse is just switching y and x your answer should be . p^-1 (m)=5m-40

4 0

2 years ago

the area of John's garden is the same size of Sarah's garden. John's garden has a width of 9 meters, and Sarah's garden has a wi

Alekssandra [29.7K]

The combined area of both gardens is 72 square meters.

Step-by-step explanation:

Given,

Width of John's garden = 9 meters

Width of Sarah's garden = 6 meters

Let,

l be the length of John's garden.

Length of John's garden = l+2

It is given that area of both gardens is same,

Area of Sarah's garden = Area of John's garden

Length * Width = Length * Width

$6*(l+2)=9*l\\6l+12=9l\\12=9l-6l\\12=3l\\3l=12$

Dividing both sides by 3

$\frac{3l}{3}=\frac{12}{3}\\l=4$

Length of John's garden = 4 meters

Length of Sarah's garden = 4+2 = 6 meters

Combined area = Area of John's + Area of Sarah's

Combined area = (Length * Width) + (Length * Width)

Combined area = (4*9)+(6*6)

Combines area = 36+36 = 72 square meters

The combined area of both gardens is 72 square meters.

4 0

4 years ago