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3 years ago

PLEASE TELL ME ITS ANSWER

Mathematics

1 answer:

Dafna11 [192]3 years ago

7 0

Step-by-step explanation:

6) x+y=60

x/y=7/5------(2)

x=(7/5)y

(7/5)y + y =60

(12/5)y=60

y=60(5/12)

y= 25

x=(7/5)y=(7/5)×25 =35

the two numbers are 35 and 25

7)distance walked by A = 4t

distance walked by B = 5t

4t+5t=27

9t=27

t=27/9=3hours

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Can someone help me with this problem? <br> a + (b + 12) = (b + 12) + a

Aleksandr [31]

Answer: True 12=12

a+(b+12)=(b+12)+a

a+b+12=b+12+a

Which equals each other

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3 years ago

What is the value of (2x^2-5x+4)if x =7

Troyanec [42]

<span>We have to use PEMDAS for this expression.

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

</span>(2x^2 - 5x + 4) Original Mathematical Expression

[2(7)^2 - 5(7) + 4] Plugging the value of x, 7 into expression.

There are parentheses, so that means we have to work in them.

There are exponents, so we have to do those first.

[2(49) - 5(7) +4] Exponents.

There is multiplication, that we can do, so we do that left to right.

[98 - 35 + 4] Multiplication.

There is no division.

There is addition and subtraction, so we do those left to right.

[63 + 4] Subtraction.

67 Addition.

Final Answer: 67

6 0

3 years ago

Read 2 more answers

In a survey, 200 people were polled about whether they preferred spending their free time playing sports, watching a movie, or r

Rama09 [41]

A) 25% of males preferred playing sports.

Explanation) .25 is the same is 25%.

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4 years ago

Axis of sym: x =

marta [7]

Answer:

<h2>SEE BELOW</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>

quadratic function
PEMDAS

<h3>let's solve:</h3>

vertex:(h,k)

therefore

vertex:(-1,4)

axis of symmetry:x=h

therefore

axis of symmetry:x=-1

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vertex form of quadratic equation:

y=a(x-h)²+k

therefore

y=a(x-(-1))²+4
y=a(x+1)²+4

it's to notice that we don't know what a is

therefore we have to figure it out

the graph crosses y-asix at (0,3) coordinates

so,

3=a(0+1)²+4

simplify parentheses:

$3 = a(1 {)}^{2} + 4$

simplify exponent:

$3 = a + 4$

therefore

$a = - 1$

our vertex form of quadratic equation is

y=-(x+1)²+4

let's simplify it to standard form

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$y = - ( {x}^{2} + 2x + 1) + 4$

simplify parentheses:

$y = - {x}^{2} - 2x - 1 + 4$

simplify addition:

$y = - {x}^{2} - 2x + 3$

therefore our answer is D)y=-x²-2x+3

the domain of the function

$x\in \mathbb{R}$

and the range of the function is

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$\sf divide \: both \: sides \: by \: - 1$

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factor out x and -1 respectively:

$\sf \implies \: x(x + 3) - 1(x + 3 )= 0$

group:

$\implies \: (x - 1)(x + 3) = 0$

therefore

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3 years ago

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kkurt [141]

An inverse function is a function that reverses another function, so we have a function called:

$p(x)$

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$p^{-1}(x)$

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Which are the figures shown below.

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