13. Calcule:

PLEASE HELP

jeka57 [31]

Answer:

x=3.5

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

A woman making $1500 per month has her salary reduced by 10% because of sluggish sales. One year later, after a dramatic improve

UkoKoshka [18]

Answer:

after the raise, her salary is $1755 per month
this is a +17% change from her original salary

Step-by-step explanation:

The multiplier of her original salary to her reduced salary is ...

(1 - 10%) = 0.90

The multiplier of her reduced salary after her raise is ...

(1 +30%) = 1.30

The multiplier of her raised salary from her original salary is ...

(0.90)(1.30) = 1.17 = (1 +17%)

Her salary after the 17% raise is ...

1.17·1500/mo = $1755/mo

8 0

3 years ago

Read 2 more answers

Solve the system using substitution x+5y=0 3y+2x=-21

Crazy boy [7]

Answer:

$\left \{ {{x = -15} \atop {y=3}} \right.$

Step-by-step explanation:

$\left \{ {{x + 5y = 0} (1) \atop {3y + 2x = -21}(2)} \right. \left \{ {{x = -5y} \atop {3y + 2x = -21}} \right. \left \{ {{x = -5y} \atop {3y + 2*(-5y) = -21}} \right. \left \{ {{x = -5y} \atop {3y - 10y = -21}} \right. \\ \left \{ {{x = -5y } \atop {-7y = -21}} \right. \left \{ {{x = -5y} \atop {y= 3 }} \right. \left \{ {{x = -5 * 3} \atop {y=3}} \right.=> \left \{ {{x=-15} \atop {y=3}} \right.$