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3 years ago

Helppppppppppplszzzz

Mathematics

2 answers:

pshichka [43]3 years ago

8 0

Answer:

3x=15

Step-by-step explanation:

3(5)=15 it's the only one where x can be 5

Slav-nsk [51]3 years ago

4 0

Plug x = 5 into all the equations
A: 2 + 5 = 3 (false)
B: 3(5) = 15 (true)
C: 5/2 = 10 (false)
D: 5 - 7 = 12 (false)

Solution: B

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The family size bottle of sunscreen holds 12 fluids (fl oz) of sunscreen. The regular bottle holds 75% less. How many fewer flui

asambeis [7]

Answer:

9 fewer ounces

Step-by-step explanation:

first divide 12 by 100 to get .12

then multiply that by 75 and get 9

12-9=3

3 0

3 years ago

1. Evaluate each expression when x = -2 and y = 3.

borishaifa [10]

a) 3(-2) + 4(3) = -6 + 12 = 6

b) 2(-2) -3(3) +5 = -4 -9 + 5 = -8

c) 4(-2) -(3) = -8 -3 = -11

d) -(-2) -2(3) = 4 -6 = -2

e) (1/2)(-2) +(3) = -1 +3 = 2

f) (2/3)(3) -(1/2)(-2) = 2 + 1 = 3

5 0

3 years ago

Make a line plot for each set of data.

Gala2k [10]

Answer:

Look at Step by Step

Step-by-step explaination

All you need to do is find the frequency of the test scores.

70 = 2 dots

75 = 0

80 = 3 dots because there are 3 students that got a 80 %

85 = 3 dots because there are 3 students that got a 80 %

90 = 4 dots because there are 4 students that got a 90 %

95 = 3 dots

100+ = 0 dots

3 0

3 years ago

Which table describes the behavior of the graph of f(x) = 2x3 – 26x – 24?

In-s [12.5K]

Answer:

For x∈ {-∞,-3} y<0, below x-axis

x∈ {-3,-1} y>0, above x-axis

x∈ {-1,4} y<0, below x-axis

x∈ {4,∞} y>0, above x-axis

Step-by-step explanation:

f(x)= $2x^{3}-26x-24$

$2x^{3}-26x-24$ =0

$2x^{3}-26x-24=0\\2x^{3}-2x-24x-24=0\\2x(x^{2} -1)-24(x+1)=0\\2x(x+1)(x-1)-24(x+1)=0\\(x+1)(2x^{2} -2x-24)=0\\=> x+1=0 => x_{1}=-1\\$

$=> 2x^{2} -2x-24=0\\=>2(x^{2} -x-12)=0\\=> x^{2} -x-12=0\\=> x^{2} -4x+3x-12=0\\=> x(x-4)+3(x-4)=0\\=> (x-4)(x+3)=0\\$

$=> x-4=0\\=> x_{2}=4\\=> x+3=0\\=>x_{3}=-3\\$

For x∈ {-∞,-3} y<0, below x-axis

x∈ {-3,-1} y>0, above x-axis

x∈ {-1,4} y<0, below x-axis

x∈ {4,∞} y>0, above x-axis

7 0

3 years ago

Read 2 more answers

Alan sells electronics, earning a base wage of $320 for one week, and a commission equal to 5% of his sales. he needs to earn at

aksik [14]

Answer:

320 +0.05s ≥ 600
sales ≥ $5600

Step-by-step explanation:

For sales of 's', Alan's earnings will be ...

320 +0.05s

He wants that to be at least 600, so the inequality is ...

320 +0.05s ≥ 600

Its solution is found by subtracting 320 and dividing by 0.05.

0.05s ≥ 280

s ≥ 5600

Alan's weekly sales must be at least $5600 for his earnings to cover his expenses.

5 0

3 years ago