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almond37 [142]
3 years ago
15

I rlly need this badly pls show work :(( (y = mx + b)

Mathematics
1 answer:
melamori03 [73]3 years ago
5 0

Answer:

4) slope (m) = -3, y-intercept(b) = 6

5) slope(m) = 4/5, y-intercept(b) = -3

Step-by-step explanation:

use the equation y = mx + b, m is your slope and b is your y-intercept

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PQRS is a parallelogram. If mQRS = (9x - 20)° and
ivolga24 [154]

Answer:

x = 8.5

Step-by-step explanation:

In this question, we are to calculate the value of x.

To calculate this, we shall be utilizing one of the important properties of parallelogram.

This property is that opposite angles of a parallelogram are equal.

This means that mQSR = mSPQ = 4x + 90

Now to finally calculate x, we make use of another important parallelogram property which is that angles of parallelogram which faces each other are supplementary.

This means that they add up to be 180

Since mQSR faces mQRS

This means that;

4x + 90 + 9x -20 = 180

13x + 70 = 180

13x = 110

x = 110/13 which is approximately 8.5

8 0
3 years ago
√25x+75 +3√x-2 =2+4√x-3 +√9x-18
Otrada [13]

Answer:

Step-by-step explanation:

\large  \boldsymbol{ \boxed{\sqrt{a}\cdot \sqrt{b}=\sqrt{a\cdot b}   }} \\\\\\ \sqrt{25x+75} +3\sqrt{x-2} =2+4\sqrt{x-3} +\sqrt{9x-18} \\\\ \sqrt{25} \cdot \sqrt{x+3}+3\sqrt{x-2}  =2+4\sqrt{x-3} +\sqrt{9}\cdot \sqrt{x-2}  \\\\5\sqrt{x+3} +3\sqrt{x-2} \!\!\!\!\!\!\!\!\!\!\bigg{/}  \ \ =2 +4\sqrt{x-3} +3\sqrt{x-2} \!\!\!\!\!\!\!\!\!\!\bigg{/} \\\\(5\sqrt{x+3})^2 =(2+4\sqrt{x-3} )^2 \\\\  \ \ \  let  \ \ t=x+3  \ \ ; \ \  \  t-6=x-3 \\\\ \big(5\sqrt{t} \ \big)^2=(2+\sqrt{t-6} )^2 \\\\                                 \large \boldsymbol{}    25t=4+16\sqrt{t-6} +16(t-6) \\\\(9t+92)^2=(16\sqrt{t-6} )^2 \\\\81t^2+1656t+8464=256(t-6)\\\\81t^2+1400t+10000=0 \\\\ D=1400^2-324000=-128000=> \\\\D

6 0
3 years ago
The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly selected parts. The sample standard
luda_lava [24]

Answer: 0.3849

Step-by-step explanation:

Given : sample size : n= 51

sample standard deviation : s= 0.46

Significance level : \alpha=1-0.95=0.05

Using chi-square distribution, the critical values will be :

\chi^2_{\alpha/2, n-1}=\chi_{0.025,\ 50}=71.4202

\chi^2_{1-\alpha/2, n-1}=\chi_{0.975,\ 50}=32.3574

Confidence interval for population standard deviation (\sigma) :

\sqrt{\dfrac{s^2(n-1)}{\chi^2_{\alpha/2}}}

Substitute all the values , we get

\sqrt{\dfrac{(0.46)^2(50)}{71.4202}}

Hence, the 95% two-sided confidence interval for σ : 0.3849

8 0
3 years ago
How do you write 6,007,200 in two other forms
miskamm [114]
Six million and seventy two hundred. 6.0072 x 10*

*=6
3 0
4 years ago
Chris is a big fan of the baseball team in the city where she lives, and she loves to go to the games with her family. Chris and
Jet001 [13]

Answer:

B

Step-by-step explanation:

5 0
3 years ago
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