MATHEMATICS HIGH SCHOOL

How to solve -5/7-11/7x=-y
2y=7+5x

Answers

Answer 1
Answer: \left\{\begin{array}{ccc}-(5)/(7)-(11)/(7)x=-y&/\cdot(-1)\n2y=7+5x\end{array}\right\n\left\{\begin{array}{ccc}(5)/(7)+(11)/(7)x=y\n2y=7+5x\end{array}\right\n\nsubstitute\n\n2\cdot\left((5)/(7)+(11)/(7)x\right)=7+5x\n\n(10)/(7)+(22)/(7)x=7+5x\ \ \ /\cdot7\n\n10+22x=49+35x\n\n22x-35x=49-10\n\n-13x=39\ \ \ /:(-13)\n\nx=-3

\left\{\begin{array}{ccc}x=-3\ny=(5)/(7)+(11)/(7)x\end{array}\right\n\left\{\begin{array}{ccc}x=-3\ny=(5)/(7)+(11)/(7)\cdot(-3)\end{array}\right\n\left\{\begin{array}{ccc}x=-3\ny=(5)/(7)-(33)/(7)\end{array}\right\n\left\{\begin{array}{ccc}x=-3\ny=-(28)/(7)\end{array}\right\n\left\{\begin{array}{ccc}x=-3\ny=-4\end{array}\right

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PLEASE HELP ASAPExplain how the number of chromosomes per cell is cut in half during meiosis, in which the
diploid parent cell produces haploid daughter cells.

Answers

During meiosis I, homologous chromosomes are pulled apart to produce two daughter cells. These daughter cells then divide again in meiosis II, only now it is the sister chromatids that are split apart. The ploidy of the daughter cells is less than the ploidy of the parent cells, thus resulting in diploid parent cells and haploid daughter cells.

Find the length of BC.
A)8
B)12
C)16
D)18

Answers

Answer:

i think its A (edit: im gonna take that back because i was looking at the wrong side, logically it is 12)

Step-by-step explanation:

Answer:

B. 12

Step-by-step explanation:

logically speaking is 12

André gets paid $5 a week for his allowance and $10every time he mows his neighbor's yard. He puts all
his money into his piggy bank.
His piggy bank contains $70 and has only $5 bills
and $10 bills. He also knows he has 11 total bills in
the bank.
How many of each type of bill does André have in
the bank?

Answers

Answer:

André has 8 $5 bills in his piggy bank

Step-by-step explanation:

Let's call the number of $5 bills in André's piggy bank "x" and the number of $10 bills "y."

From the information given, we can create two equations to represent the situation:

André's weekly allowance: $5 per week.

Money earned for mowing the neighbor's yard: $10 per time.

André's total earnings can be represented by the equation:

Total Earnings = 5x (from allowance) + 10y (from mowing the yard)

We also know that the total amount in the piggy bank is $70:

Total Amount = 5x (from $5 bills) + 10y (from $10 bills)

We're also told that André has a total of 11 bills in his piggy bank:

Total Bills = x (number of $5 bills) + y (number of $10 bills) = 11

Now we have a system of two equations with two variables:

5x + 10y = 70

x + y = 11

We can solve this system of equations using substitution or elimination. Let's use the elimination method. First, we can multiply the second equation by 5 to make it easier to eliminate one of the variables:

5x + 10y = 70

5x + 5y = 55

Now, subtract the second equation from the first equation to eliminate x:

(5x + 10y) - (5x + 5y) = 70 - 55

5y = 15

Now, divide both sides by 5 to find the value of y (the number of $10 bills):

5y/5 = 15/5

y = 3

So, André has 3 $10 bills in his piggy bank. Now, we can use this value to find the number of $5 bills using the second equation:

x + 3 = 11

Subtract 3 from both sides:

x = 11 - 3

x = 8

So, André has 8 $5 bills in his piggy bank.

Which of these items is the better buy? A. An 8-pack of glue sticks for $3.99 or 1 glue stick for $0.54? B. A 12-pack of tape for $2.50 or 1 roll of tape for $0.19 c. A 100-pack of pencils for $4.88 or 1 pencil for $0.05 d. A 50-pack of paper clips for $0.89 or a 25-pack of paper clips for $0.45

Answers

Answer: A is the 8-pack, B is the single roll, C is the 100 pack, D is the 50 pack.

Step-by-step explanation:

For each of these, multiply the smaller number by a number that has a product of the bigger number, example D. multiply 25 by 2 to get 50, then compare the totals.

Answer:

the first one is an 8 pack of glue sticks

the second one is 1 tape roll for .19

the third one is 100 pack of pencils for 4.88

the fourth one is a 25 pack of paper clips

Step-by-step explanation:

Solve the equation. 33 = p - 6.71
a. 39.71
b. 26.29
c. 39.71
d. 26.29

Answers

33 = p - 6.71

Add 6.71 on both sides

33 + 6.71 = p - 6.71 + 6.71

p = 33 + 6.71

p = 39.71


Your final answer is a. 39.71 and c. 39.71.
answer (c) 39.71

hope it would help

A can of spaghetti has a diameter of 12 cm and a height of 16 cm. The can contains spherical meatballs, each with a radius of 3 cm, that take up 25% of the volume.How many meatballs are in the can?

Use 3.14 to approximate pi and express your answer as a whole number.

Answers

Hey there, the radius of the can is 1/2 of 12 cm=6 cm, the volume of the can is pi r^2h=Pi 6^{2}16=1809.5573cm3, Now, the volume of the meatball is 4/3 pi r^{3}=4/3 pi 3^{3}=113.09734, Then, 25% of the can=1809.5573/4=452.389325, The meatballs in area=25% of can over volume of meatballs=452.389325/113.09734=4 meatballs, Therefore, the answer is 4 meatballs.
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