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4 years ago

Plzzzzzzzzzzzzzzzzzzzzzzzzzzzz help

Mathematics

2 answers:

lubasha [3.4K]4 years ago

8 0

Find the ratio of the corresponding sides:

SR is 2 times ML

TP is 2 times NJ

QR is 2 times KL

QR = 2 x 2 = 4

telo118 [61]4 years ago

6 0

Answer:

I believe its 4

Step-by-step explanation:

The enlargement is 2x so everything on the larger version is 2 times bigger so on the small version QR = 2

2 x 2 = 4

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Solveeee both i neeeeeedddd hellllpppp

SCORPION-xisa [38]

Short answer: C
Remark
Since b is all by itself in equation 2, Substitute it into equation 1.

2a + 3b = 5
b = a - 5 Put this result in equation 1. Be sure and use brackets.
2a + 3(a - 5) = 5 Remove the brackets.
2a + 3a - 15 = 5 Notice the -5 inside the brackets becomes - 15
Combine like terms on the left.
5a - 15 = 5 Add 15 to both sides
5a = 5 + 15
5a = 20 Divide by 5
a = 20/5
a = 4

So far, c is the only possible answer.
b = a - 5
b = 4 - 5
b = - 1

5 0

3 years ago

The sum 9 of and x<br> ??

Papessa [141]

X + 9 is your answer!

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4 0

3 years ago

50 POINTS AND MARK BRAINLIEST

givi [52]

Step-by-step explanation:

a) Using the distance formula,

$RS=\sqrt{(2-4)^{2}+(3-4)^{2}}=\sqrt{4+1}=\boxed{\sqrt{5}}\\ST=\sqrt{(4-5)^{2}+(4-0)^{2}}=\sqrt{1+16}=\boxed{\sqrt{17}}\\RT=\sqrt{(2-5)^{2}+(3-0)^{2}}=\sqrt{9+9}=\boxed{3\sqrt{2}}$

b) Using the slope formula,

$m_{\overline{RS}}=\frac{4-3}{4-2}=\boxed{\frac{1}{2}}\\m_{\overline{ST}}=\frac{0-4}{5-4}=\boxed{-4}\\m_{\overline{RT}}=\frac{0-3}{5-2}=\boxed{-1}$

c) The triangle is <em>scalene</em> because each of the sides is of a different length.

4 0

2 years ago

Location is known to affect the number, of a particular item, sold by HEB Pantry. Two different locations, A and B, are selected

12345 [234]

Answer:

d) [-16.03,-3.97]

$-16.03 \leq \mu_A -\mu_B \leq -3.97$ .

Step-by-step explanation:

Notation and previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$n_A=18$ represent the sample of A

$n_B =13$ represent the sample of B

$\bar x_A =39$ represent the mean sample for A

$\bar x_B =49$ represent the mean sample for B

$s_A =8$ represent the sample deviation for A

$s_B =4$ represent the sample deviation for B

$\alpha=0.01$ represent the significance level

Confidence =99% or 0.99

The confidence interval for the difference of means is given by the following formula:

$(\bar X_A -\bar X_B) \pm t_{\alpha/2}\sqrt{(\frac{s^2_A}{n_A}+\frac{s^2_B}{n_B})}$ (1)

The point of estimate for $\mu_A -\mu_B$ is just given by:

$\bar X_A -\bar X_B =39-49=-10$

The appropiate degrees of freedom are $df=n_1+ n_2 -2=18+13-2=29$

Since the Confidence is 0.99 or 99%, the value of $\alpha=0.01$ and $\alpha/2 =0.005$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,29)".And we see that $t_{\alpha/2}=2.756$