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Tamiku [17]
2 years ago
7

Look at pic 10 pts will mark brainilest tell me if u need multiple choice answers

Mathematics
1 answer:
stealth61 [152]2 years ago
8 0

Answer:

Step-by-step explanation:

1/2 b*h *2

1/2 * 14*24*2= 336

The base l*w

10*14= 140

Sides l*w

25*10*2= 500

500+140+336=976

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What is the value of x in the solution to this system of equations?
siniylev [52]

Answer:

D) x=9

Step-by-step explanation:

x = 2y- 5

2y = x + 5

y = (x+5) / 2

4x + 7(x+5)/2 = 85

8x + 7x + 35 = 85*2

15x + 35 = 170

15x = 170 - 35 = 135

x = 135/15 = 9

8 0
3 years ago
Psychologists in Montreal and Toronto conducted a study to determine if babies show any preference for speech over general noise
Lostsunrise [7]

Answer:

H0 : μ1 - μ2 = 0

H1: : μ1 - μ2 ≠ 0

we reject the Null and we conclude that babies prefer actual speaking to humming.

Step-by-step explanation:

H0 : μ1 - μ2 = 0

H1: : μ1 - μ2 ≠ 0

Mean difference, d = 27.79

Standard deviation of difference, Sd = 63.18

Sample size, n = 50

The test statistic :

d / (Sd / √n)

Test statistic :

27.79 / (63.18 / √50)

27.79 / 8.9350012

= 3.11

Using the Test statistic score, we can obtain the Pvalue

Using the standard normal table ;

Pvalue = P(x<-Z or x>Z) = 0.0018709

Pvalue is very low

Pvalue < α ; Hence, we reject the Null and we conclude that babies prefer actual speaking to humming.

8 0
3 years ago
Amy is making a puppet that requires equal pieces of string to make it dance. Amy has 33 inches of string. How many 5 1 2 inch p
stepan [7]
33 / (5 1/2) = 
33 / (11/2) =
33 * 2/11 =
66/11 =
6 pieces <===
7 0
3 years ago
Read 2 more answers
Factor completely 4а^2 - 8а - 5
Evgesh-ka [11]

Answer:

(2a + 1)(2a - 5)

Step-by-step explanation:

Given

4a² - 8a - 5

Consider the factors of the product of the coefficient of the a² term and the constant term which sum to give the coefficient of the a- term

product = 4 × - 5 = - 20 and sum = - 8

The factors are + 2 and - 10

Use these factors to split the a- term

4a² + 2a - 10a - 5 ( factor the first/second and third/fourth terms )

= 2a(2a + 1) - 5(2a + 1) ← factor out (2a + 1) from each term

= (2a + 1)(2a - 5)

5 0
2 years ago
Joan has 20 stickers Mia has 45. Mia takes 27 out of her collection and adds them to Joan’s. How many sticker does Joan have?
Otrada [13]

Answer:

47

Step-by-step explanation:

20 + 27 = 47

3 0
2 years ago
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