MATHEMATICS HIGH SCHOOL

Evaluate the expression for the given value of x
-7x +2 for x = -7

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

If x=-7, all we need is to substitute x for -7

-7x+2

-7×-7+2

-7×-7 is 49 because 7 times 7 is 49 and a negative times a negative is a positive.

Which leaves us 49+2

51.

Answer 2

Answer: Yes the up guys is right

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The time it takes for an object stopped from a certain speed can be modeled by the equationt=1/2 square root v, where v is the speed of object in meters per second. if it takes 3 seconds for the object to stop, what is the speed of object in meters per second?
Is this correct? please answer
Solve the equation X^2 +10x+24=0

Which is the smallest decimal?
A. 0.04
B. 0.4
C. 0.39
D. 0.049

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

b has the least zeros so that's closer to the whole numbers

How do i solve this??? added a pic

Answers

x= -4 y=16-5=11

x= -2 y=4-5= -1

x= -1 y=1-5= -4

x= 0 y= -5

x= 1 y= 1-5= -4

x= 2 y=4-5= -1

x=3 y=9-5=4

x=4 y=16-5=11

Rays of light incident on a lens and parallel to the principal axis of the lens converge

Answers

So we want to know in which point do light rays that are incident on a lens and parallel to the principal axis converge. Rays parallel to the principal axis and are incident on a lens converge in the focal point of the lens. So the correct answer is focal point.

The correct answer is:

Focal point.

Explanation:

The focal point of a lens is the point in space where parallel light rays meet after they pass through the lens. A perfect" lens sends all light rays through one focal point, which result in the clearest image.

What two numbers multiply into 30 but adds up to negative 11

Answers

-6 and -5 both add up to -11 and multiply to 30

-5 and -6
-5*-6 = 30, since the two factors are negative the answer is positive.
-5-6 = -11, -5-6 is the same as -5 + -6 which equals -11

Use the stem-and-leaf plot below to find the mean, median, and mode of the data set. Round to the nearest wholenumber
Stem Leaf
5 2, 2, 2.
8. 1,5,9
9. 3,4,6
1. 2,7

Answers

Answer:

The mean is 65.72 , median is 81 and mode is 52

Step-by-step explanation:

Stem Leaf

5 2, 2, 2.

8. 1,5,9

9. 3,4,6

1. 2,7

Number : 52,52,52,81,85,89,93,94,96,12,17

Arrange in ascending order :

12,17,52,52,52,81,85,89,93,94,96

$Mean = \frac{\text{Sum of all observations}}{\text{No. of observations}}\nMean =(12+17+52+52+52+81+85+89+93+94+96)/(11)$

Mean =65.72

$Median = (n+1)/(2) \text{th term}=(11+1)/(2)=6 \text{th term} = 81$

Mode = most occurring number = 52

Hence The mean is 65.72 , median is 81 and mode is 52

Mike is buying new uniforms for work. He buys 2 uniforms, each of which include pair of pants for $34 and a shirt.His total was $106,without taxWhat is the equation for this situation?