Can some1 help me with grade7s math?

Answers

Answer 1

Answer: $8-2b=-(2)/(3)(12b+6)\n 8-2b=-8b-4\n 6b=-12\n b=-2\n\n -5=(8m+12)/(4)\n -5=2m+3\n 2m=-8\n m=-4\n\n -12j+4=-4-12j\n 4=-4\n j\in\emptyset \Rightarrow A$

$5x+7=(1)/(2)(10x+12)\n5x+7=5x+6\n7=6\nx\in \emptyset \Rightarrow B\n\n-(1)/(9)(18x+27)=1+x-4-3x\n-2x-3=-2x-3\n0=0\nx\in\mathbb{R} \Rightarrow C\n\n(x+3)/(4)=(3)/(4)x+(3)/(4)|\cdot4\nx+3=3x+3\n-2x=0\nx=0 \Rightarrow A\n\n4+3x=2x-10\nx=-14 \Rightarrow A$

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4x-3y=-1 -2x+5y=11 solve for x and y

Answers

x=2
y=3
hope this helps

X=2
Y=3
You just have to do process of elimination. You have to try out the numbers.

can someone please help me asap you know i help you when needed anyways i need to be able to plot the x and y coordinates so how do i do that? when y=5 times 2^x x is the value i need to plug in to plot it on the graph the graph goes up until 20 so i just need some x values please

Answers

First question do u have a graphing calculator?? If so, go to the y= menu and type in 5times 2^x then hit 2nd and then graph find any coordinate pair you want Keep in mind I am explaining the steps to take on a Texas Instruments TI84 plus calculator Good luck!!

The equation y=5(2^x) gives you everything you need to plot any number of points. You can give x any value and then just solve for y. So what you are doing is giving the x coordinate and solving the equation for the y coordinate. I like to keep it simple. Try using 0, 1, -1, 2, and -2 for the x coordinates.

y = 5(2^x)
y = 5(2^0)
y = 5(1)
y = 5

So when x is 0, y is 5 (0, 5)

y = 5(2^1)
y = 5(2)
y = 10

So when x is 1, y is 10 (1, 10)

y = 5(2^-1)
y = 5(1/2)
y = 5/2

So when x is -1, y is -10 (-1, 5/2)

y = 5(2^2)
y = 5(4)
y = 20

So when x is 2, y is 20 (2, 20)

y = 5(2^-2)
y = 5(1/4)
y = 5/4

So when x is -2, y is 5/4 (-2, 5/4)

Now plot the points and it should look something like this... (see the pic)

The legs of a right triangle are 4 units and 7 units. What is the length of the hypotenuse?A. square root 33 units
B. square root 65 units
C. 33 units
D. 65 units

Answers

Answer:

Correct option is:

B. square root 65 units

Step-by-step explanation:

Pythagorean theorem states that the square of hypotenuse is equal to the sum of squares of the legs of the right angled triangle.

Here, we are given that:

The legs of a right triangle are 4 units and 7 units.

By Pythagoras theorem

Hypotenuse²=4² +7²

= 16+49

= 65

⇒ Hypotenuse= $√(65)$

Hence, Correct option is:

B. square root 65 units

the square root of 65 units

What is 20% of what number is 96?

Answers

so first of all you have to change 20% into 0.20 then do 0.20 x 96 and get 19.2 or 19.20

Plz Help! ASAP!!!!Weights of eggs laid by two chickens are recorded for a full year. Both data sets follow a normal distribution.

Chicken A: Standard deviation of A is 4.6 grams; 68% of the eggs fall between 50.9 grams and 60.1 grams.

Chicken B: Standard deviation of B is 4.9 grams; 68% of the eggs fall between 51.9 grams and 61.7 grams.

The difference between the mean weight of Chicken B’s eggs and the mean weight of Chicken A’s eggs to the nearest tenth is...?

Answers

The difference between the meanweight of Chicken B's eggs and the mean weight of Chicken A's eggs to the nearest tenth is 1.8 grams.

What is a normal distribution?

A normaldistribution is a probability distribution that is symmetric around the mean, with most of the data points falling close to the mean and fewer data points falling farther away from it.

The shape of a normal distribution is often referred to as a bellcurve because when the distribution is graphed, the resulting curve resembles a bell

We have,

Since both datasets follow a normaldistribution, we can use the empirical rule (also known as the 68-95-99.7 rule) to find the mean weight of each chicken's eggs.

For Chicken A, we know that 68% of the eggs fall between 50.9 grams and 60.1 grams. This means that the mean weight of Chicken A's eggs is the average of these two values:

Mean of A = (50.9 + 60.1) / 2 = 55.0 grams

For Chicken B, we know that 68% of the eggs fall between 51.9 grams and 61.7 grams. This means that the mean weight of Chicken B's eggs is the average of these two values:

Mean of B = (51.9 + 61.7) / 2 = 56.8 grams

The difference between the meanweight of Chicken B's eggs and the mean weight of Chicken A's eggs is:

Difference = Mean of B - Mean of A

= 56.8 - 55.0

= 1.8 grams

Therefore,

The difference between the meanweight of Chicken B's eggs and the mean weight of Chicken A's eggs to the nearest tenth is 1.8 grams.

Learn more about normaldistribution here:

brainly.com/question/29509087

#SPJ3

Answer:

Do you still need help?

Step-by-step explanation:

What is the length of st

Answers

15.

You have to start by find the length of CD which you can do by subtracting the other lengths by the overall perimeter. Then you can set up a proportion using DE/BC = UV/ST. Solve for ST

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