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Inga [223]
3 years ago
10

Sara has chocolates in her bag. Her sister has 80 chocolates which is 4 times as many chocolates as Sara has. how many chocolate

s does Sara have?
Mathematics
2 answers:
Alexxandr [17]3 years ago
5 0
All you have to do is divide 80 chocolates by 4. Which would give you that Sara has 20 chocolates.

ANSWER:

20 chocolates. Hope this helped. Have a great day. A thank you and (or) brainliest is always appreciated. Goodbye!
Nata [24]3 years ago
4 0
80 chocolates ÷ 4 = 20
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If alpha and beta are the zeroes of the polynomial 6x2+x-2 find the value og alpha/beta + beta/alpha
castortr0y [4]
6x^2+x-2=6x^2+4x-3x-2=2x(3x+2)-1(3x+2)\\\\=(3x+2)(2x-1)\\\\3x+2=0\to x=-\frac{2}{3}\\\\2x-1=0\to x=\frac{1}{2}\\\\\alpha=-\frac{2}{3};\ \beta=\frac{1}{2}\\\\\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{-\frac{2}{3}}{\frac{1}{2}}+\frac{\frac{1}{2}}{-\frac{2}{3}}=-\frac{2}{3}\cdot\frac{2}{1}-\frac{1}{2}\cdot\frac{3}{2}=-\frac{4}{3}-\frac{3}{4}\\\\=-\frac{16}{12}-\frac{9}{12}=-\frac{25}{12}=-2\frac{1}{12}


use\ Vieta's\ formula:\\\\\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{\alpha^2+\beta^2}{\alpha\beta}=\frac{\alpha^2+2\alpha\beta+\beta^2-2\alpha\beta}{\alpha\beta}=\frac{(\alpha+\beta)^2-2\alpha\beta}{\alpha\beta}=\frac{(\alpha+\beta)^2}{\alpha\beta}-2\\\\\alpha+\beta=\frac{-b}{a};\ \alpha\beta=\frac{c}{a}\\\\\frac{(\alpha+\beta)^2}{\alpha\beta}-2=\frac{\left(\frac{-b}{a}\right)^2}{\frac{c}{a}}-2=\frac{b^2}{a^2}\cdot\frac{a}{c}-2=\frac{b^2}{ac}-2

6x^2+x-2\\\\a=6;\ b=1;\ c=-2\\\\\frac{\alpha}{\beta}+\frac{\beta}{\alpha}=\frac{1^2}{6\cdot(-2)}-2=\frac{1}{-12}-2=-2\frac{1}{12}
7 0
3 years ago
4. The figure shows a rectangle with a width of 6k inches. The length of the rectangle is 4 inches shorter than the width.
vesna_86 [32]

Answer:

C.

Step-by-step explanation:

sorry if its not correct but i hope it helps

8 0
3 years ago
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PLEASE HELP I WILL GIVE BRAINLIEST ​
kobusy [5.1K]

Answer:

If using one pound of pumpkin the baker needs to use 4 pounds of flour mixture

Step-by-step explanation:

step 1: I am going to convert the measurements

into decimals

8/5=1.6

2/5=.4

step 2: I will use cross multiplication to find out how much pumpkin for one pound of flour

1.6=.4

 1=?

1*.4=.4/1.6=.25

step 3:  I will convert .25 into a fraction

.25=1/4

for every 1/4 pound pumpkin, I will use 1 pound of flour

which is why

If using one pound of pumpkin the baker needs to use 4 pounds of flour mixture

6 0
3 years ago
Help please:) have a good day
iVinArrow [24]

Answer:

D

Step-by-step explanation:

Because both triangle contain angle

3 0
3 years ago
Eric is making cookies. He needs to measure ½ a cup of sugar. However, he only has a ⅛ measuring cup. How many times should he f
Olin [163]

Answer:

4 times

Step-by-step explanation:

3 0
3 years ago
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