1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Art [367]
3 years ago
10

Sonya goes into a newsagent's. She buys 3 items. They cost £1.25, 45p and £2.50. Sonya uses her calculator to check the total co

st. The calculator gives this answer. 4.2 Is this answer correct?.
Mathematics
1 answer:
sattari [20]3 years ago
5 0

Answer:

No she is not correct

Step-by-step explanation:

Because when you add 1.25+0.45+2.50=4.14

not 4.2

You might be interested in
Given angle ABC shown on the coordinate plane below.
Crank

The attached image shows the image of A"B"C" after the transformation

<h3>What is the transformation of the triangle about?</h3>

The transformation rule states:

A"B"C" = Ro90° (T(-4,3)(ABC))

This implies that one need to rotate the triangle in a 90⁰ clockwise direction, and then one need to translate the triangle.

Using the image shown, the coordinates of ABC are;

A = (-1, 2)

B = (1, 4)

C = (3, -1)

The 90⁰ rule clockwise rotation  will be:

(x,y) -- (y,-x)

So, when translated, it will be:

A' = (2, 1)

B' = (4, -1)

C' = (-1, -3)

Then the translation of the triangle using T(-4,3):

(x, y) -  (x - 4, y + 3)

So, there is:

A'' = (-2, 4)

B'' = (0, 2)

C'' = (-5, 0)

Learn more about transformation from:

brainly.com/question/28108536

#SPJ1

6 0
1 year ago
Simplify 7x²-x²<br> how to simplify this maths question
kondaur [170]

Hi student, let me help you out! :)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . .

We are asked to simplify the expression \large\pmb{7x^2-x^2}.

\triangle~\fbox{\bf{KEY:}}

  • Combine like terms! :)

That's exactly what we need to do - combine like terms.

So, we subtract:

\star~\large\pmb{7x^2-x^2}

Which gives us:

\star~\large\pmb{6x^2}

Hope it helps you out! :D

Ask in comments if any queries arise.

#StudyWithBrainly

~Just a smiley person helping fellow students :)

6 0
1 year ago
Shawn and dorian rented bikes from two different rental shops. the prices in dollars, y, of renting bikes from the two different
Hitman42 [59]
They paid $24 each for the rental.
6 0
3 years ago
Read 2 more answers
A researcher tests five individuals who have seen paid political ads about a particular issue. These individuals take a multiple
devlian [24]

Answer:

t=\frac{46-40}{\frac{5.148}{\sqrt{5}}}=2.606    

The degrees of freedom are given by:

df=n-1=5-1=4  

The p value wuld be given by:

p_v =2*P(t_{(4)}>2.606)=0.060  

For this case the p value is higher than the significance level so then we can conclude that the true mean is not significantly different from 40

The distribution with the critical values are in the figure attached

Step-by-step explanation:

Information given

48, 41, 40, 51, and 50

The sample mean and deviation can be calculated with these formulas:

\bar X= \frac{\sum_{i=1}^n X_i}{n}

s =\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

\bar X=46 represent the mean height for the sample  

s=5.148 represent the sample standard deviation

n=5 sample size  

\mu_o =40 represent the value that we want to test

\alpha=0.05 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test

Hypothesis to test

We want to test if the true mean for this case is equal to 40, the system of hypothesis would be:  

Null hypothesis:\mu = 40  

Alternative hypothesis:\mu \neq 40  

The statistic is given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Replacing we got:

t=\frac{46-40}{\frac{5.148}{\sqrt{5}}}=2.606    

The degrees of freedom are given by:

df=n-1=5-1=4  

The p value wuld be given by:

p_v =2*P(t_{(4)}>2.606)=0.060  

For this case the p value is higher than the significance level so then we can conclude that the true mean is not significantly different from 40

The distribution with the critical values are in the figure attached

6 0
3 years ago
Graph -1,-1 on this graph​
TiliK225 [7]

Answer:

so that's how you plot their intersection

4 0
2 years ago
Other questions:
  • In the summer a large pool evaporates water at 15% per day. If the pool starts out with 25,700 gallons of water, which function
    6·1 answer
  • A light bulb consumes 9450 W in five days in six hours how many watt hours does a consume per day?
    5·1 answer
  • Y= 5x + 3<br> y=2x+5<br> a. no solutions<br> b. one solution<br> c. infinitely many solutions
    6·1 answer
  • Can i please get help on this question?
    8·1 answer
  • Helppppp me pleaseeeee
    10·1 answer
  • then we can walk 1/3 miles in 5 minutes if Tammy walks a constant Pace how far does he walk in 1 minute ​
    11·1 answer
  • The vertices of a triangle are A (0,0), B (3, 4) and C (-4,5). Find the length of each side. ​
    15·1 answer
  • Simplify<br> -5(2x+4)-3(x-6)
    5·2 answers
  • Which net represents a three-dimensional figure with a surface area of 864 square centimeters Syntax error from line 1 column 49
    12·2 answers
  • Calcule a medida da altura da cachoeira do Aracá, da torre Eiffel e da torre CN,
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!