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2 years ago

Helpp! Show work please, thank you :) Brainliest 30 points

Mathematics

1 answer:

yarga [219]2 years ago

7 0

Answer:

x² - 3x - 40 = 0

Step-by-step explanation:

(x - (-5))(x - 8) = 0

(x + 5)(x - 8) = 0

x² + 5x - 8x - 40 = 0

x² - 3x - 40 = 0

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If f(x) = x ^ 2 + 3 , then f(x+y)=?

kobusy [5.1K]

Answer:

f(x)=x^2+3

f(x+y)=(x+y)^2+3

this is done by replacing x with (x+y)

f(x+y)=x^2+2xy+y^2+3

therefore : f(x+y)= x^2+y^2+2xy+3

5 0

3 years ago

Find an equation for the plane through the points p=(0,0,0), q=(0,1,0), and r=(1,2,3)

jek_recluse [69]

Hello,

Assume Ax+By+Cz+D=0 the plane 's equation.

p=(0,0,0)==>A*0+B*0+C*0+D=0==>D=0

q=(0,1,0)==>A*0+B*1+C*0+0=0==>B=0

r=(1,2,3)==>A*1+0*2+C*3+0=0==>A=-3C
Let C=1==>A=-3

An equation of the plane is -3x+z=0

6 0

3 years ago

Evaluate the expression for the given values.

blagie [28]

we have given an expression $mx-y$ .

we have given the value of x,y and m .

$m=5,x=3,y=8$ .

we need to find the value of expression mx-y.

we need to plug the respective values and solve.

$mx-y=(5)*(3)-(8)=15-8=7.$ .

7 is the value of expression mx-y.

3 0

3 years ago

URGENT! PLEASE HELP!!

geniusboy [140]

Answer:

A= 5cm

B=13cm

C=15cm

hope this helps!

6 0

3 years ago

Read 2 more answers

Elena surveyed her classmates to see how many like to make jewelry. When she asked 20 of her classmates, 50 percent said they li

nordsb [41]

10 students of Elena's classmates like to make jewellery.

<u>Step-by-step explanation:</u>

Let total no.of classmates who liked the jewellery = x

Here, in the given problem, given she asked her classmates '20'. So, it clearly shows that total number of students/classmates = 20. Also, in that, 50% said like to make jewellery. Now find 'x' as below,

$x = 50 \% \text { of } 20$

$x = \frac{50}{100} \times 20$

$x = 10$

Hence, the total number of classmates who liked to make Jewellery = 10

5 0

3 years ago