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laila [671]
3 years ago
8

Choose the two number sentences that are true.

Mathematics
1 answer:
Inessa05 [86]3 years ago
3 0

Answer:

D

because 12+7=19

5+14=19

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The 8th Grade wants to raise money for a field trip that costs $800. 15 students are in charge of fundraising. What is the minim
maksim [4K]

Answer: $54.35

Step-by-step explanation:

If each one of the 15 students raises the same amount, let's define this amount by the variable X, then the total amount they will collect is 15 times X, or:

15*X

And the minimum amount they need to collect is $800

Then we will have the inequality:

15*X ≥ $800

Now we can divide both sides by 15 to get the minimum amount that each student needs to raise:

(15*X)/15 ≥ $800/15

X ≥ $54.33...

Where we should round up the right number to $54.35, because we can not have a $0.0333... and if we round down, they would collect less than $800.

Then the inequality is:

X ≥ $54.35

This means that the minimum amount that each one of the 15 students needs to collect is $54.35

7 0
3 years ago
WILL GIVE BRAINLIEST ian solved the system of equations by making a substitution for y in the second equation. What equation did
Aleonysh [2.5K]

5x -2(-3x+1) =31

5x +6x-2=31

Choice B

6 0
3 years ago
What are the coordinates of the vertex of the function f(x)=x^2+10x−3? (–5, –28) (–5, 28) (5, –28) (5, 28)
polet [3.4K]

Answer:

(-5,-28)

Step-by-step explanation:

Given

f(x)=x^2+10x - 3

Required

Find the coordinates of the vertex

Given that the function is a quadratic function;

The general form of a quadratic function is

f(x)= ax^2+bx +c

By comparison;

a = 1\ b = 10\ and\ c = -10

To calculate the coordinates of the vertex;

we start by calculating the x-coordinate;

x = \frac{-b}{2a}

Substitute 10 for b and 1 for a

x = \frac{-10}{2*1}

x = \frac{-10}{2}

x = -5

Substitute x = -5 in the given function;

y=x^2+10x - 3

y=(-5)^2+10*-5 - 3

y=25-50 - 3

y=-28

<em>Hence, the coordinates of the vertex is (-5,-28)</em>

6 0
4 years ago
Plsss help me ASAP !!! you get to win brainlist
TiliK225 [7]

Answer:

122 employees

Step-by-step explanation:

So, first you have to find 22% OF 100 WHICH IS 22. (100x0.22= 22) Then, since they have to lay off 22% more people you add the 22% of 100 (22) to the 100. (100+22=122) This means that they have laid off 122 employees this year. I hope this helps!

5 0
3 years ago
What is the value of x in the equation x – y = 30, when y = 15?
erastovalidia [21]

 x – y = 30, when y = 15

Then plug in the value

x - 15 = 30

Add 15 to both sides

x -15 + 15 = 30 + 15

Simplify:

x = 45

7 0
3 years ago
Read 2 more answers
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