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3 years ago

Janelle has 10 groups of 10 crayons and 3 crayons left over. How many crayons does Janelle have?

Mathematics

2 answers:

Sloan [31]3 years ago

4 0

Answer of your question is 7

Fofino [41]3 years ago

4 0

103 crayons. 10 sets of 10 is 100, plus the 3 left over= 103

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Write the following quotient in the form a+bi.<br> -7i/2-7i

Helga [31]

Answer:

$\large\boxed{\dfrac{49}{53}-\dfrac{14}{53}i}$

Step-by-step explanation:

$\text{Use}\\\\i=\sqrt{-1}\to i^2=-1\\\\(a-b)(a+b)=a^2-b^2\to(a-bi)(a+bi)=a^2+b^2\\\\\text{distributive property}\ a(b+c)=ab+ac\\---------------------\\\\\dfrac{-7i}{2-7i}=\dfrac{-7i}{2-7i}\cdot\dfrac{2+7i}{2+7i}=\dfrac{-7i(2+7i)}{2^2+7^2}=\dfrac{(-7i)(2)+(-7i)(7i)}{4+49}\\\\=\dfrac{-14i-49i^2}{53}=\dfrac{-14i-49(-1)}{53}=\dfrac{-14i+49}{53}\\\\=\dfrac{49}{53}-\dfrac{14}{53}i$

8 0

3 years ago

Read 2 more answers

Please help. Full explanation if you can.

sukhopar [10]

392 boots. If you divide everything into "sets" of an unknown amount, there are 5 more "sets" of boots than sandals, also known as the 245 boots. So if you divide 245 by 5, you'll get the number of items in a "set". Then just multiply by 8 from the 8:3 ratio. If you check it, it will come out to 392 boots to 147 sandals, which I think is ridiculous since sandals are supposed to come in pairs so you should never have a odd number. But anyway, 392 - 147 = 245

6 0

3 years ago

If a student has an average exam score between 70 and 79, he will earn a grade of C in his algebra course. Suppose he has three

goldenfox [79]

Answer:

(64,86.5)

Step-by-step explanation:

find the case where he gets 70 and the case where he gets 79

if his average is 70:

(75+62+85+2x)/5=70

(222+2x)/5=70

222+2x=350

2x=128

x=64

if his average is 79:

(75+62+85+2x)/5=79

(222+2x)/5=79

222+2x=395

2x=173

x=86.5

7 0

3 years ago

Please help me please!!

irakobra [83]

Answer:

mok

Step-by-step explanation:

mok

7 0

3 years ago

The ratio of the length 2.0 meters to the length 1.2 meters is

photoshop1234 [79]

Answer:

The Ration of length 2.0 meters to the length 1.2 meters = 5 : 3

Step-by-step explanation:

The given two length are 2.0 m and 1.2 m

Length L1 = 2.0 m And

Length L2 = 1.2 m

SO, The ratio of L1 : L2 = $\frac{2.0}{1.2}$

Or, The ratio of L1 : L2 = $\frac{20}{12}$

∴ The ratio of L1 : L2 = $\frac{5}{3}$

Hence The ratio of L1 : L2 is 5 : 3 Answer

4 0

3 years ago