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borishaifa [10]

3 years ago

9

The sum of two numbers is 23. The larger number y is 1 less than twice the smaller number x. Write and solve a system of linear

equations to find the two numbers.

1 answer:

krok68 [10]3 years ago

5 0

Answer:

15 and 8

Step-by-step explanation:

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Sam is renting one of two cars to go on a 300-mile trip. The first car can travel 75 miles on 5 gallons of gas. The second car c

djverab [1.8K]

First let’s establish a few things, The first car can travel 300 miles with 20 gallons of gas, if 14 gallons of gas costs 49.49 then for ever gallon of gas Sam is paying 3 dollars and 53.5 cents. That means for 20 gallons, Sam will need around 71$ for the entire trip if he uses the first car.

8 0

2 years ago

Write an expression for the quotient of a number and 5 decreased by 4

Oksi-84 [34.3K]

Q=x/5-4

let me know if you have any questions

3 0

3 years ago

Is is true that the coefficient of the expression 18z-7(-3+2z) of z is 13

Sever21 [200]

<span>18z-7(-3+2z)
= 18z + 21 - 14z
= 4z + 21

answer is False
</span><span>coefficient of z is 4, not 13</span>

3 0

3 years ago

What is the decimal equivalent of 11 80 ?

dezoksy [38]

Answer:

0.1375

Step-by-step explanation:

6 0

3 years ago

Which equation represents a circle with the same radius as

sattari [20]

Answer :

$(x+1)^2+(y-1)^2=4^2$ and $(x+1)^2+(y-1)^2=16$

Step-by-step explanation:

Given : A circle with the same radius as the circle shown but with a center at (-1.1).

To find : Which equation represents a circle ?

Solution :

The equation of a circle with center (h,k) and radius r is given by :

$(x-h)^2+(y-k)^2=r^2$

Here, we are given (h,k)=(-1,1)

and radius r=4 units

So, equation of circle will be :

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

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

or $(x+1)^2+(y-1)^2=16$

Therefore, the required equations of circle are

$(x+1)^2+(y-1)^2=4^2$ and $(x+1)^2+(y-1)^2=16$

7 0

3 years ago