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3 years ago

Please help! (sorry about the cracks in my ipad)

Mathematics

2 answers:

Talja [164]3 years ago

6 0

Answer:

Step-by-step explanation:

Rudik [331]3 years ago

4 0

Answer:

The answer is 4

Step-by-step explanation:

12•7=21•x

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2,400 principal earning 2%, compounded annually, after 7 years. Find the balance in the account

charle [14.2K]

A = P (1 + r/n) ^nt
P = 2400
r = .02
n = 1
t = 7

Answer: $2756.86

3 0

3 years ago

I'm desperate, this is my last assignment to do for now

zmey [24]

Answer:

Given Below.
[ done below, side changing which changed sign + to - and - to + ]

Step-by-step explanation:

6. x + 21 = 56

→ x = 56 – 21

→ x = 35

7. n – 13 = 8

→ n = 8 + 13

→ n = 21

8. w – 7 =41

→ w = 41 + 7

→ w = 48

9. b + 22 = 89

→ b = 89 – 22

→ b = 67

10. z – 53 = 26

→ z = 26 + 53

→ z = 79

4 0

2 years ago

Which other parts must be equal for triangle ABC= triangle MTR by

lesya692 [45]

Answer:

see below

Step-by-step explanation:

ASA stands for Angle-side-Angle

thus, for ∆ABC $\cong$ ∆MTR

$\displaystyle \angle C \cong \angle R$

SAS stands for Side-angle-Side 

thus,for ∆ABC $\cong$ ∆MTR

$\displaystyle \overline{ MR }\cong \overline{MT}$

likewise,

AAS stands for Angle-Angle-Side

thus,for ∆ABC $\cong$ ∆MTR

$\displaystyle \angle M \cong \angle T$

7 0

2 years ago

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sampl

kompoz [17]

Complete Question

Statistics professors believe the average number of headaches per semester for all students is more than 18. From a random sample of 15 students, the professors find the mean number of headaches is 19 and the standard deviation is 1.7. Assume the population distribution of number of headaches is normal.the correct conclusion at $\alpha =0.001$ is?

Answer:

There is no sufficient evidence to support the professor believe

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 18$

The sample size is $n = 15$

The sample mean is $\= x = 19$

The standard deviation is $\sigma = 1.7$

The level of significance is $\alpha = 0.001$

The null hypothesis is $H_o: \mu = 18$

The alternative hypothesis is $H_a : \mu > 18$

The critical value of the level of significance from the normal distribution table is

$Z_{\alpha } = 3.290527$

The test hypothesis is mathematically represented as

$t = \frac{\= x - \mu }{ \frac{\sigma}{ \sqrt{n} } }$

substituting values

$t = \frac{ 19 - 18}{ \frac{1.7}{ \sqrt{15} } }$

$t = 2.28$

Looking at the value of t and $Z_{\alpha }$ we can see that $t < Z_{\alpha }$ so we fail to reject the null hypothesis.

This mean that there is no sufficient evidence to support the professor believe

3 0

3 years ago

A number, n, is multiplied by - 5/8. The products is - 0.40 What is the value of n? It would also help if you would explain how

Kay [80]

I'm not sure if those numbers are negatives or thats just a hyphen but:

N(-5/8)=-0.40

Division is always the opposite of multiplication

-0.40/(-5/8)=0.64

N=0.64

5 0

2 years ago