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2 years ago

Help plsss thankss

Mathematics

1 answer:

klasskru [66]2 years ago

5 0

Answer:

The coefficient of the quadratic term ,a,determines how wide or narrow the graphs are, and

weather the graph turns upward or downward

Step-by-step explanation:

this is your answer

You might be interested in

Write an equation and solve each problem.

Oksi-84 [34.3K]

Answer:

x-8=37

37+8=x

45=x

45 is your answer

Step-by-step explanation:

7 0

3 years ago

PLEASE HELP ASAP 30 PTS

Marrrta [24]

Answer:

c (2,3,-2)

Step-by-step explanation:

3x+y+z = 7

x+3y-z =13

y = 2x-1

Add the first two equations together to eliminate z

3x+y+z = 7

x+3y-z =13

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

4x+4y = 20

Divide by 4

4x/4 + 4y/4 = 20/4

x+y = 5

We know y = 2x-1. substitute this into the equation

x+ (2x-1) = 5

Combine like terms

3x-1 =5

Add 1 to each side

3x-1+1 =5+1

3x=6

Divide by 3

3x/3 = 6/3

x=2

Now we can find y

y = 2x-1

y = 2(2)-1

y =4-1

y= 3

We know x and y, now we need to find z

3x+y+z = 7

3(2) +3 +z = 7

6+3+z =7

9+z=7

Subtract 9 from each side

(-9+z =7-9

z=-2

So x=2,y=3 =-2

(2,3,-2)

7 0

3 years ago

Find a rational number and an irrational number that are between 5.2 and 5.5. Include the decimal approximation of the irrationa

stiks02 [169]

To answer this question let us first define what a rational and irrational number is. A rational number is basically a number whose decimals are terminating (ie have an end) or repeating (continuously repeats the same pattern.

An example of this from your question would be

5.3 - terminating rational number
5.333333333333..... - repeating rational number

Irrational numbers are basically numbers whose decimals are non terminating and non repeating.

An example would be the square root of 29. When plugged in a calculator this would result in 5.3851648071.....
This number goes on and on with no set pattern.

8 0

4 years ago

An article reports on an experiment in which each of five groups consisting of six rats was put on a diet with a different carbo

loris [4]

Answer:

H0 is rejected, Hence the true average DNA content is affected by the type of carbohydrate in the diet between samples

Step-by-step explanation:

A B C D E

2.58 2.63 2.13 2.41 2.49

∑A=2.58 ∑B=2.63 ∑C=2.13 ∑D=2.41 ∑E=2.49

A² B² C² D² E²

6.6564 6.9169 4.5369 5.8081 6.2001

∑A²=6.6564 ∑B²=6.9169 ∑C²=4.5369 ∑D²=5.8081 ∑E²=6.2001

Calculations

Group A B C D E Total

N n1=1 n2=1 n3=1 n4=1 n5=1 n=5

∑xi T1=2.58 T2=2.63 T3=2.13 T4=2.41 T5=2.49 ∑x=12.24

∑x²i 6.6564 6.9169 4.5369 5.8081 6.2001 ∑x²=30.1184

Mean xi 2.58 2.63 2.13 2.41 2.49 Total2.448

Σ Σ xij^2 = 185.4 given

Let k = the number of different samples = 5

n=n1+n2+n3+n4+n5=1+1+1+1+1=5

Overall ˉx=12.24/5 =2.448

∑x=T1+T2+T3+T4+T5=2.58+2.63+2.13+2.41+2.49=12.24----1

Correction Factor=(∑x)²/n=12.242/5=29.9635--------(2)

∑T²i/ni=(2.582/1+2.632/1+2.132/1+2.412/1+2.492/1)=30.1184------(3)

∑x²=∑x²1+∑x²2+∑x²3+∑x²4+∑x²5

=6.6564+6.9169+4.5369+5.8081+6.2001=30.1184-------(4)

ANOVA:

Step-1 : sum of squares between samples

SSB=(∑T2i/ni)-(∑x)2/n

=(3)-(2)

=30.1184-29.9635

=0.1549

Step-2 : Total sum of squares

SST=SSB-CF

= 185.4-2.488

=182.952

Step-3 : Sum of Squares Within Samples

SSW=∑x²-(∑T²i/ni)=SST- SSB=

= 182.952-0.1549=182.7971

Step-4 : variance between samples

MSB=SSB/k-1

=0.1549/4

=0.0387

Step-5 : variance within samples

MSW=SSW/n-k

=182.7971/5-5

=36.55942

Step-6 : test statistic F for one way ANOVA test

F=MSB/MSW

=0.0387/36.55942 = 0 .001058

ANOVA table

Source Sums Degrees Mean

of Variation of Squares of freedom Squares

SS DF MS F

B/w samples SSB = 0.1549 k-1 = 4 MSB = 0.0387 0.001

Within samples SSW = 0 n-k = 0 MSW = 36.55942

Total SST = 0.1549 n-1 = 4

H0 : The true average DNA content is not affected by the type of carbohydrate in the diet between samples

Ha : The true average DNA content is affected by the type of carbohydrate in the diet between samples

F(4,0) at 0.05 level of significance =0.5

As calculated F=0.001 >0.5

So, H0 is rejected, Hence the true average DNA content is affected by the type of carbohydrate in the diet between samples

6 0

3 years ago

Desiree made 100 cookies this week, she baked 4 more than three times the total she made last week. How many cookies did she bak

Alla [95]

I can’t explain but I can do this

3x + 4 = 100 x = 32 cookies

4 0

3 years ago

Read 2 more answers