Answer:
Rita had r apps as the start of the day
After she deleted 5 apps,
equation for apps of cora = (r-5)
Equation for apps of Rita = 2 (r-5)
Step-by-step explanation:
<em>5 to the 2nd power times 5 to the 2nd power is equivalent to 625</em>
<h2>
Explanation:</h2>
In this case, we have the following statement:
<em>5 to the 2nd power times 5 to the 2nd power. </em>In a mathematical language:
From product rules, we know that:
Applying this rule to our problem:
<em>5 to the 2nd power times 5 to the 2nd power is equivalent to 625</em>
<h2>
Learn more:</h2>
Rules of exponents: brainly.com/question/12140557
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Answer:
you don't have -i? because it should be -i
Answer:
Step-by-step explanation:
Total Students in Class = 25+ 15=40
Probability= (Number of Girls in Class) ÷ (Total students in Class)
Probability of girl= 15 ÷ 40 = 0.375
Answer:
The scientist needs 80 liters of 25% solution and 40 liters of 10% solution.
Step-by-step explanation:
If x is the liters of 25% solution, and y is the liters of 10% solution, then:
x + y = 120
0.25x + 0.10y = 0.20(120)
Solve the system of equations using substitution or elimination. Using substitution:
0.25x + 0.10(120 − x) = 0.20(120)
0.25x + 12 − 0.10x = 24
0.15x = 12
x = 80
y = 40
The scientist needs 80 liters of 25% solution and 40 liters of 10% solution.
