All categories

3 years ago

A friend needs at least $125 to go on the class trip. He has saved $45. He makes

Mathematics

2 answers:

sammy [17]3 years ago

8 0

Answer:

Sorry, I don't know exactly what an inequality is but he needs to mow 4 lawns.

Step-by-step explanation:

$125-$45=80

$20x?=$80

?=4

kykrilka [37]3 years ago

4 0

Say he needs to mow 'x' no of lawns to go on trip,

So money he will get by mowing lawn

=$20x

which is the amount of money he needs

(=$125)

But he already has $45.

So,

$125-$45=$80 is the amount of money he will require just to go trip.

i.e. ,

➧20x ⩽80

which is the required inequality.

Divide both sides by 20,

which means he needs to mow 4 lawns to go on trip.

You might be interested in

Explain 15 is not a prime factor

MissTica

15 is not a prime factor as it is divided by 1,3,5 and 15.

Additional information:

Prime numbers are those numbers which can only be divided by itself .for instance:1,2,3,5,7 ,11,13 etc.

Composite number s are those numbers which can be also divided by other numbers,For instance: 4,6,8,10 etc

Hope it helps....

7 0

3 years ago

Question 1 What is the solution of n² - 49 = 0? 0 +7 07 -7 O no solution

Sphinxa [80]

Hey there!

This can be written as $n^{2}-(7)^{2}$

This is in form of $\fbox{a^{2}-b^{2}}$ , it can be expanded as $\fbox{(a-b)(a+b)}$

=> (n-7)(n+7)=0
=> n -7 = 0 or n + 7 = 0
=> n = 7 or n = -7

So option 7 , -7 are correct.

Hope this is clear :)
Have a good day:)

7 0

2 years ago

Read 2 more answers

Solve for y. A. 10 B.12 C. 15 D. 18

djverab [1.8K]

Y=10°
If we're solving for the ninety degree angle, which I seem to doubt, then if 3x=90 then 2x=60 giving a missing total of 30. 30/3 equals 10

4 0

3 years ago

Read 2 more answers

I need help on how to solve the problem and the correct answer :)

lakkis [162]

This is a system of linear equations. First, you can add the two equations together to eliminate the y so that you can solve for x:

-5x + -7x = 0 + -96

-12x = -96

x = 8

Use x to solve for y:

-5 * 8 + 8y = 0

Add 40 to both sides and divide by 8:

y = 5

So, x = 8 and y = 5.

3 0

4 years ago

A triangle has a height of 15 in. and a area of 120 in. What is the length of it's base?

jek_recluse [69]

Answer:

b=16

Step-by-step explanation:

Formula~ 1/2*b*h

1/2*15*b=120

7.5b=120

b=120/7.5

b=16

(you can substitute the value to check-i've done it below)

1/2*16*15=?

if you work it out, the ans will be 120, therefore the ans is correct!

7 0

3 years ago