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Elanso [62]
3 years ago
14

Sarah is training to run a race. She runs 1 mile per day for the first week. She doubles that and runs 2 miles each day for the

second week. She doubled her daily run again for the third week. How many miles did she run if she ran everyday those three week? Challenge question...
Mathematics
1 answer:
swat323 years ago
8 0

Answer:

She would have ran 48 miles, (if i did my math correctly)

Step-by-step explanation:

7 x 1 = 7

7 x 2 = 13

7 x 4 = 28

7+13+28 =48

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Use the quadratic formula to solve the equation​.<br><br> 4x^2−10x+5=0
finlep [7]

Quadratic formula:

x=\frac{-b±\sqrt{b^{2}-4ac } }{2a}

What do we have:

a=4

b=-10

c=5

Substitude:

x=\frac{10±\sqrt{b^{2}-4(4)(5)}}{2(a)}

Solve:

x=\frac{10±\sqrt{(-10)^{2}-4(4)(5)}}{2(4)}\\\\x=\frac{10±\sqrt{100-4(20)}}{8}\\\\x=\frac{10±\sqrt{100-4(20)}}{8}\\\\x=\frac{10±\sqrt{100-80}}{8}\\\\x=\frac{10±\sqrt{20}}{8}\\\\x=\frac{10±2\sqrt{5 }}{8}\\\\x=\frac{2(±5\sqrt{5) }}{2(4)}

Cancel the common terms:

x=\frac{5±\sqrt{5} }{4}

5 0
3 years ago
Solve:<br> 7v = 2v - 20<br> i'll give braniest to first to answer :)))
kirill [66]

Answer:v=-4

Step-by-step explanation:

8 0
3 years ago
Evaluate 7³=7•7•7=343
ivanzaharov [21]
343=343=343
I am pretty sure this is the answer to the problem
4 0
3 years ago
Read 2 more answers
mr. larsen's third grade class has 22 students, 12 girls and 10 boys. two students must be selected at random to be in the fall
faust18 [17]

The probability that no boys will be chosen is 0.2857

What is probability?

The area of arithmetic called likelihood deals with numerical representations of the chance that an incident can occur or that a press release is true.

Main Body:

Total students =22

total boys = 10

total girls =12

Now we have to chose 2 girls from 12 , so combination is used to select ,

⇒¹²C₂

Also, We have to chose 2 girls from 22 students

so it can be represented as ,

⇒²²C₂

Probability of choosing 2 girls = ¹²C₂/²²C₂

On solving this we will get = 0.2857

Hence the probability is 0.2857

To know more about probability , visit;

brainly.com/question/13604758

#SPJ4

5 0
1 year ago
Simplify. 32 + 1 x 2 (1).8 (2).20 (3).14 (4).11​
pshichka [43]

Answer:

31.11

Step-by-step explanation:

simplify the expression

4 0
3 years ago
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