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oksano4ka [1.4K]
3 years ago
7

Plz help me. Im stuck on this question

Mathematics
1 answer:
vladimir1956 [14]3 years ago
6 0

Answer:

4b + 10c= T

Step-by-step explanation:

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Y=2x+1<br>y=4x-5<br><br>please help​
levacccp [35]

The point of intersection would be (3, 7)

8 0
3 years ago
If your heart beats at a constant 75 per min and your 13 how many times has your heart beat in your lifetime
Vanyuwa [196]

Answer:

uh i think over 1000, 367, 890 and if u die .... it ends there

Step-by-step explanation:

5 0
3 years ago
A sample of size 60 from one population of weights had a sample average of 10.4 lb. and a sample standard deviation of 2.7 lb. A
Olegator [25]

Answer:

z=  0.278

Step-by-step explanation:

Given data

n1= 60 ; n2 = 100

mean 1= x1`= 10.4;     mean 2= x2`= 9.7

standard deviation  1= s1= 2.7 pounds ;  standard deviation 2= s2 = 1.9 lb

We formulate our null and alternate hypothesis as

H0 = x`1- x`2 = 0 and H1 = x`1- x`2 ≠ 0 ( two sided)

We set level of significance α= 0.05

the test statistic to be used under H0 is

z = x1`- x2`/ √ s₁²/n₁ + s₂²/n₂

the critical region is z > ± 1.96

Computations

z= 10.4- 9.7/ √(2.7)²/60+( 1.9)²/ 100

z= 10.4- 9.7/ √ 7.29/60 + 3.61/100

z= 0.7/√ 0.1215+ 0.0361

z=0.7 /√0.1576

z= 0.7 (0.396988)

z= 0.2778= 0.278

Since the calculated value of z does not fall in the critical region so we accept the null hypothesis H0 = x`1- x`2 = 0  at 5 % significance level. In other words we conclude that the difference between mean scores is insignificant or merely due to chance.

3 0
3 years ago
Factor 60x2 – 155x + 100 completely
gtnhenbr [62]

Answer:

hello :

60x² – 155x + 100 = 5 ( 12 x² - 31 x + 20 )

delta of ( 12x² - 31 x + 20 ) is b² - 4ac   when : a = 12    b = -31   c = 20

delta = ( - 31 )² - 4(12)(20) = 961 - 960 = 1

x1 = (31-1)/24 = 30/24 = 5/4

x2 =  (31+1)/24 = 32/24 = 4/3

Factor 60x2 – 155x + 100 = 5 (12(x -5/4)(x- 4/3)) = 60 (x -5/4)(x- 4/3)




4 0
3 years ago
Read 2 more answers
What is the area of 10.5 tall and 9.2 long
mihalych1998 [28]

Answer:

A=LW

A=10.5 x 9.2

A=96.6

Step-by-step explanation:


8 0
2 years ago
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