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3 years ago

Mathematics I need help

Mathematics

1 answer:

Mkey [24]3 years ago

8 0

Answer:

The answer is b

Step-by-step explanation:

0.63-0.2=0.43

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Write 18/42 in simplest form. Use / for the fraction line.

Aleksandr-060686 [28]

18/42
Both are divisible by 2
9/21
both are divisible by 3
3/7

7 0

3 years ago

Read 2 more answers

Barbara bought items for $7.50, $8.25, and $6.15. She gave the clerk $30.00. How much was her change?

aleksley [76]

Answer:

$8.10

Step-by-step explanation:

yes

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3 years ago

Find the solution to the system. Write your solution as an ordered pair (x,y) with no spaces, no solution, or infinitely many. X

chubhunter [2.5K]

Answer:

(15, 11).

Step-by-step explanation:

Given the system of equation;

X=2y-7 ..... 1

4x+y=71 ....2

Substitute 1 into2;

4(2y-7) + y = 71

8y - 28 + y = 71

9y - 28 = 71

9y = 71 + 28

9y = 99

y = 11

Substitute y = 11 into 1;

x = 2y - 7

x = 2(11)-7

x = 22-7

x = 15

hence the solution to the equation is (15, 11).

4 0

3 years ago

30 points

boyakko [2]

Answer:

1) The value of c is given by

$c=4$

2) The value of k is given by

$k=-4150$

Step-by-step explanation:

Given that function g is defined by $g(x)=cx-3$ , where c is a constant.

To find c:

Also given that value of g(x) at x=0.5 is equal to -1

ie., $g(0.5)=-1$

At x=0.5

$g(0.5)=c(0.5)-3=-1$

$(0.5)c-3=-1$

$(0.5)c=-1+3$

$(0.5)c=2$

$c=\frac{2}{0.5}$

$c=\frac{2}{\tfrac{1}{2}}=2\times \frac{2}{1}$

Therefore $c=4$

2) Given that function h is defined by $h(x)=\frac{20x-k}{x+50}$ , where k is a constant.

To find k:

Also given that value of h(x) at x=20 is equal to 65

ie., $h(20)=65$

At x=20

$h(20)=\frac{20(20)-k}{20+50}=65$

$400-k=65(70)$

$-k=4550-400$

$-k=4150$

Therefore $k=-4150$

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3 years ago

What characteristics can be seen in the graphs for a system that have one solution, no solution or infinitely many solutions?

Novosadov [1.4K]

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3 years ago