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2 years ago

QUICK PLEASE!!!

Mathematics

2 answers:

Delicious77 [7]2 years ago

8 0

Answer:

im just going to copy and paste the correct ones and their answers:

Problem: The sum of twice a number and −6 is 9 more than the opposite of the number. Find the number.

Equation: 2n − 6 = 9 − n

n = 5

Problem: Anna drove 450 km in 6 hours. Find her rate of travel.

Equation: 450r = 6

r = 75

Problem: Three times a number increased by 44 is the same as the opposite of the number. Find the number.

Equation: 3n + 44 = −n

n = -11

omeli [17]2 years ago

4 0

Answer:

a and c

Step-by-step explanation:

a. $2n-6=9-n$

$2n+n=9+6$

$3n=15$

$n=\frac{15}{3}=5$

b. $Rate=\frac{distance}{time}$

Distance=450 km

Time=6 hours

Rate= $\frac{450}{6}=75 Km/h$

But from given equation

$450r=6$

$r=\frac{6}{450}$

Hence, it is wrong.

c. $3n+44=-n$

$3n+n=-44$

$4n=-44$

$n=\frac{-44}{4}=-11$

d.Let number of quarter=x

Number of dimes=5 x

According to question

$x+5x=$ $5.25

But given equation

$x+10x=$ $5.25

This is wrong.

Hence, option a and c are true.

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