All categories

2 years ago

Jerry went the store to buy cat food, but when he got there, the brand name

Mathematics

1 answer:

GenaCL600 [577]2 years ago

7 0

Answer:

the regular cat food costs $2.95

the wheat cat food costs $3.45

Step-by-step explanation:

so what i did was use the elimination method by setting up 2 equations r is for regular food and w is for wheat food

3r-2w=1.95

2r+2w=12.80

the way this method works is simply combining like terms into one equation

if you notice, the wheat food cancels out so we end up with

5r=14.75

then dividing 14.75 by 5 gets you r

r=2.95

you then plug in r back into one of the equations from before

2(2.95)+2w=12.8

then you solve for w

5.9+2w=12.8

2w=6.9

w=6.9/2

w=3.45

r=2.95

You might be interested in

How do I do this? f(a)=4a+5; Find f(2)

Mariana [72]

F(2)=4(2)+5
f(2)=8+5
f(2)=13

6 0

2 years ago

WILL GIVE BRAINLIEST ANSWER !! NEED HELP QUICK !!

k0ka [10]

Answer:

its letter A

Step-by-step explanation:

8 0

2 years ago

Please Help!!

Genrish500 [490]

Given

$a\sqrt{x+b}+c=d$

we have

$\sqrt{x+b}=\dfrac{d-c}{a}$

Squaring both sides, we have

$x+b=\dfrac{(d-c)^2}{a^2}$

And finally

$x=\dfrac{(d-c)^2}{a^2}-b$

Note that, when we square both sides, we have to assume that

$\dfrac{d-c}{a}>0$

because we're assuming that this fraction equals a square root, which is positive.

So, if that fraction is positive you'll actually have roots: choose

$a=1,\ b=0,\ c=2,\ d=6$

and you'll have

$\sqrt{x}+2=6 \iff \sqrt{x}=4 \iff x=16$

Which is a valid solution. If, instead, the fraction is negative, you'll have extraneous roots: choose

$a=1,\ b=0,\ c=10,\ d=4$

and you'll have

$\sqrt{x}+10=4 \iff \sqrt{x}=-6$

Squaring both sides (and here's the mistake!!) you'd have

$x=36$

which is not a solution for the equation, if we plug it in we have

$\sqrt{x}+10=4 \implies \sqrt{36}+10=4 \implies 6+10=4$

Which is clearly false

7 0

3 years ago

The two prisms below are similar. What is the value of x? A. 30 B. 1 C. 9 D. 3

Lynna [10]

I believe it's D - 3....

4 0

3 years ago

Read 2 more answers

a construction company is building a house based on the picture. The scale from picture to real house is 1 inch= 8 feet the heig

stiv31 [10]

Answer:

The Height of the building would be 20 feet.

Step-by-step explanation:

1.) 1/8 = 2.5/X

2.) Answer: 20 Feet

3.) Cross Multiply

- 1 inch is to 8 feet as 2.5 inches is to 20 feet.

5 0

1 year ago