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Vlad [161]
3 years ago
13

Can anyone please help me with these sums? I need it fast. Thanks,

Mathematics
1 answer:
Scilla [17]3 years ago
5 0

Answers:

2.

a) 5y^{2} z^{2}

b) 4x^{2} y

a) 3x^{2} +2x+4

b) 3x+2

c)x-3

3.

a) 2x+3

b) 2x^{2} -6x-24

4.

a) 4x-20

b) x(3x+2)=3x^{2} +2x

I have a feeling I could be wrong for 4 a)

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What is a real-world situation that can be modeled by the equation | x - 14 | = 3?
Anna [14]
Absolute value is the distance/difference from a number to the standard number. In this case, the standard value is 14. Let's say 7-year-old Mike is riding his bike up and down the neighborhood street. Mike's house is located on 14th Avenue. Mom told Mike to stay within 3 blocks from home, so Mike can go as far north the 17th street and as far south to 11th street. 
x-14=3 or x-14=-3
x=17 or x=11

I hope this makes sense to you.
5 0
3 years ago
PLEASE IT'S DUE TOMORROW
jeka94

Answer:

1. 50 miles per hour

2.$3.25  (22.75 / 7 = 3.25)

3. Tony's Sewing Store

4. 100 hours (47 / 23.5 = 2, 50 x 2 = 100)

8 0
2 years ago
Find the coordinates of the image after a reflection across the line y = x.
Marat540 [252]

Answer:

(2 1) for L (4 3) for G  (4 -1)

Step-by-step explanation:

5 0
3 years ago
a study of the effects of exercis used rats bred to have high or low capacity for exercise. The 8 high capacity rats had mean bl
zavuch27 [327]

Answer:

t=-2.86

Step-by-step explanation:

From the question we are told that:

Sample 1 n_1=8

Sample 1 mean blood pressure \=x_1=89mmHg

Sample 1 variance \sigma_1=81

Sample 2 n_2=8

Sample 2 mean blood pressure \=x_2=105mmHg

Sample 2 variance \sigma_2=169

Generally the equation for the test of statistic is mathematically given by

t=\frac{\=x_1-\=x_2}{\sqrt{\frac{\sigma_2}{n_1}+\frac{\sigma_2}{n_2} } }

t=\frac{89-105}{\sqrt{\frac{81}{8}+\frac{169}{8} } }

t=-2.86

therefore the samples test for comparing the two population means

t=-2.86

3 0
3 years ago
Could someone please answer this, and give an explanation. So I can fully understand it.
svp [43]
So the graph shows the cost of the phone call on the y-axis and the length of the phone call on the x-axis.
The question ask is what is the least expensive per minute.
So your equation is cost/time.
Then you plug in the values of each point.
w=$1.25/2 minutes
x=$2/5 minutes
y=$2/10 minutes
z=$2.50/10.5 minutes
Solve each question-
w=0.63 (rounded)
x=0.4
y= 0.2
z=0.24 (rounded)
These values show the cost per minute of each point. So, in order the answer the question which one cost the least per minute you would select the lowest value answer from the question of each point. Which would be y.

7 0
3 years ago
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