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3 years ago

There are 15 girls and 12 boys what is the ratio of boys and girls

Mathematics

1 answer:

Vesnalui [34]3 years ago

3 0

Answer:

4:5

Step-by-step explanation:

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What is the inverse of f(x) = x/5 -2

Cerrena [4.2K]

Answer:

y= 5x+10

Step-by-step explanation:

Inverse basically means y is now x and x is now y.

y= x/5 -2 becomes x= y/5 -2

Remember to always leave your equation f(x) = ...

i.e. y =...

x= y/5 -2

add 2 both sides

x+2 = y/5

multiply 5 both sides

5(x+2) = y

Hence,

y= 5x + 10

Hope this helps!

Please mark brainliest if you think I helped! Would really appreciate!

8 0

3 years ago

Public opinion in the large city of Bedrock is that 60 percent of the residents are in favor of increasing taxes to fund alterna

uysha [10]

Answer: 0.8461

Step-by-step explanation:

Let p be the proportion of residents are against the increase of taxes to fund alternatives to drug addiction treatment.

As per given , we have p=0.40

A random sample is taken with size : n= 400

Expecting sample proportion : $\hat{p}=\dfrac{150}{400}=0.375$

Now , the probability that more than 150 of the residents surveyed will be against increasing taxes if a random sample of 400 residents are surveyed will be :

$P(p>0.375)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.375-0.40}{\sqrt{\dfrac{0.40(0.60)}{400}}})$

$=P(z>\dfrac{0.375-0.40}{\sqrt{\dfrac{0.40(0.60)}{400}}})\ \ [\because\ z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}]$

$=P(z>-1.02)=P(z-z)=P(Z$

$\approx0.8461$ [By z-table]

Hence, the approximate probability that more than 150 of the residents surveyed will be against increasing taxes if a random sample of 400 residents are surveyed is 0.8461 .

4 0

3 years ago

Jerome is planning a fundraiser.

PilotLPTM [1.2K]

Answer:132

Step-by-step explanation: 1.25-.50=75 the profit of each apple is 75 cents

99 dollars divided by .75 is 132

8 0

3 years ago

One number is 5 more than another number. their sum is −15 . what are the numbers?

Aliun [14]

X=5+y
x+y=-15

subsitute 5+y for x

5+y+y=-15
5+2y=-15
minus 5 from both sides
2y=-20
divide both sides by 2
y=-10

sub back
x=5+y
x=5-10
x=-5

the numbers are -10 and -5

6 0

3 years ago

The amount of money,y, in cash box after x tickets are purchased for carnival games. The slope of the line is 1/4 and the y-inte

victus00 [196]

Amount of money received when x tickets are sold=$Y

Number of tickets sold=X

Slope of line= $\frac{1}{4}$

And , y- intercept = 8

Equation of line having slope m and y-intercept c is given by,

y = m x + c,

Expressing the above statement in terms of linear equation in two variable i.e a line is

Y = $\frac{1}{4}$ X + 8

5 0

3 years ago