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postnew [5]
3 years ago
9

Help me plz I don't understand this

Mathematics
2 answers:
andrey2020 [161]3 years ago
7 0

Answer:

For example, if you want to find printable activities for third grade, click the "3" ... For each clock eliminated, the bedtime increases by one minute. ... Description: This activity requires students to tell time to the half-hour (e.g. 4:00, 5:30, 11:30).

Step-by-step explanation:

olga2289 [7]3 years ago
3 0

Answer:

D. y = 2x

Step-by-step explanation:

A proportional relationship is represented by the formula y = mx + b.

m = the slope, which is  \frac{y_{2}-y_{1} }{x_{2} - x_{1}}.

b = the y-intercept, the point where the line crosses the y-axis. We actually don't have to worry about the + b part of the formula because b = 0, so it can be left out.

To find the slope, use \frac{y_{2}-y_{1} }{x_{2} - x_{1}}. Subtract the smaller y value (2) from the larger y value (6).

(6 - 2 = 4)

Then subtract the smaller x value (1) from the larger x value (3).

(3 -  1 = 2)

So it looks something like this now:

\frac{6-2}{3-1} , which equals \frac{4}{2}

Then you divide the top part of the fraction (4) by the bottom part. (2).

\frac{4}{2} = 2. The slope (m) is 2.

So the final equation is y=2x.

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You need to reverse the symbol to solve which inequality?
Marina86 [1]

When you multiply/divide by a negative number while solving the inequality, you reverse the symbol.

A.)  4(5 - y) ≥ 80       To solve this, isolate/get the variable "y" by itself in the inequality. Divide 4 on both sides

\frac{4(5-y)}{4} \geq \frac{80}{4}

5 - y ≥ 20       Subtract 5 on both sides

5 - 5 - y ≥ 20 - 5

-y ≥ 15     Divide -1 on both sides to get "y" by itself

\frac{-y}{-1} \geq \frac{15}{-1}       Because you are dividing by a negative number, you need to reverse the sign

y ≤ -15

B.) 2(y - 3) ≥ 8      Isolate "y", divide 2 on both sides

y - 3 ≥ 4      Add 3 on both sides to get "y" by itself

y ≥ 7

C.) 3y - 4 > 1       Add 4 on both sides

3y > 1       Divide 3 on both sides to get "y" by itself

y>\frac{1}{3}

D.) -\frac{3}{4} +6y > \frac{1}{4}       Isolate "y", add 3/4 on both sides

6y > 1     Divide 6 on both sides to get "y" by itseld

y>\frac{1}{6}

7 0
3 years ago
In the triangle below, 21 = 35 and 3 = 100
vesna_86 [32]

Answer:

135

Step-by-step explanation:

Okay so we know that all angles in  tringle sums up to 180

Therefore ∠2 = 180 - ∠1 - ∠3 = 180 - 35 - 100 = 45deg

We also know that angles on a straight line add up to 180deg as well

Therefore ∠4 = 180 - ∠2 = 180 - 45 = 135deg

3 0
3 years ago
89,678 to the nearest hundred
inna [77]

Answer:

89,700

Step-by-step explanation:

4 0
3 years ago
What is the equation in point-slope form of the line that passes through (-9, 12) with a slope of 5/6?​
Hitman42 [59]

Answer:

\large\boxed{y-12=\dfrac{5}{6}(x+9)}

Step-by-step explanation:

The point-slope form of an equation of a line:

y-y_1=m(x-x_1)

<em>m</em><em> - slope</em>

<em>(x₁, y₁)</em><em> - point on a line</em>

<em />

We have

m=\dfrac{5}{6},\ (-9,\ 12)\to x_1=-9,\ y_1=12

Substitute:

y-12=\dfrac{5}{6}(x-(-9))\\\\y-12=\dfrac{5}{6}(x+9)

6 0
3 years ago
a local hamburger shop sold a combined total of 628 hamburgers and cheeseburgers on Wednesday. There were 72 fewer cheeseburger
defon
There were 386 hamburger sold
7 0
4 years ago
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