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RideAnS [48]
3 years ago
13

-2(p+5) ------------------

Mathematics
1 answer:
Ainat [17]3 years ago
8 0

Answer:

The answer is -2p-10

Step-by-step explanation:

-2(p+5)

=-2p-10

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And our teacher has a box of 100 markers the teacher gives out silver markers to each student in the class and has 16 markers le
ad-work [718]

Answer:

12 students

Step-by-step explanation:

1. 7s+16=100

We know the teacher has 100 markers, and she gave each student 7. If we say that s is the number of students, then 7s is the number of markers she gave out. We also know that she had 16 left over.

2. 7s+16-16=100-16

Subtract 16 from both sides of the equation.

3. 7s=84

Simplify the equation.

4. 7s/7=84/7

Divide both sides by 7.

5. Simplify the equation. Since s is the number of students, we now know how many students there are in the teacher's class.

7 0
3 years ago
Two walls of a canyon form the walls of a steady flowing river. From a point on the shorter wall, the angle of elevation to the
Sunny_sXe [5.5K]

Answer:

x is approximately 226.3 feet

y is approximately 308.6 feet

z is approximately 226.3 feet

Step-by-step explanation:

The given parameters of the walls are;

The angle of elevation from the top of the shorter wall to the top of the opposing wall, θ₁ = 20°

From the diagram, the angle of depression from the top of the shorter wall to the bottom of the opposing wall, θ₂ = 45°

The distance from the bottom of the shorter wall to the base of the opposing wall, l = 320 feet

x = The height of the shorter wall = l × sin(θ₂)

∴ x = 320 feet × sin(45°) = 320 feet × (√2)/2 = 160·√2 feet ≈ 226.3 feet

∴ x ≈ 226.3 feet

By observation, we have;

y = x + z × tan(θ₁)

Where;

z = l × cos(θ₂)

∴ y = 160·√2 + 320 × cos(45°) × tan(20°) ≈ 308.6

y ≈ 308.6 feet

z =  l × cos(θ₂)

∴  z = 320 × cos(45°) = 160·√2 ≈ 226.3

z ≈ 226.3 feet.

6 0
3 years ago
Question
AlekseyPX

Answer:

The population mean is 5 volts

Step-by-step explanation:

Output voltage is assumed to be normally distributed, with standard deviation 0.25 Volts

s=0.25

n = 8

H_0:\mu = 5\\H_a:\mu \neq 5

Sample mean = \bar{x}=4.85

Since n < 30 and population standard deviation is unknown

So, we will use t test

Formula : t = \frac{x-\mu}{\frac{s}{\sqrt{n}}}

t = \frac{4.85-5}{\frac{0.25}{\sqrt{8}}}

t=-1.69

Refer the t table for p value

Degree of freedom = n-1 = 8-1 = 7

So,t_{(df,\alpha)}=t_{7,0.05}=2.365

P value >α

So, We are failed to reject null hypothesis

Hence The population mean is 5 volts

7 0
4 years ago
Will mark Brianliest !!!!!!!!!! Answer please correctly !!!!!!!!!!
Nat2105 [25]

Answer:

x = 108

Step-by-step explanation:

The angles all add up to 180 degrees, so if you subtract 25 and 47 from 180, you get x.

5 0
3 years ago
Read 2 more answers
A right triangle has a hypotenuse of 10 mi. and a leg of 6 mi., what is the length of the other leg?
slava [35]

Answer:

8mi

Step-by-step explanation:

Using Pythagoras theorem

Hypotenuse square = opposite square + adjacent square.

Let the other leg be x

10 square = 6 square + x square

100 = 36 + x square

Collect like terms

X square = 100 -36

X square = 64

Find square root of both sides

X = square root of 64

X =8mi

I hope this was helpful, Please mark as brainliest

7 0
3 years ago
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