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2 years ago

Use substitution to solve the following system of equations 2x + 3y = 18 AND X = y - 6

Mathematics

1 answer:

Softa [21]2 years ago

4 0

Answer:

y=6,x=0

Step-by-step explanation:

here's an attachment with how to solve

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Show your work<br> 2) Is(-3,-7) a solution to<br> 4x – 8y < 24<br> Show your work

asambeis [7]

Answer: false, 44 is not less than 24

Step-by-step explanation:

Substitute-3 for x and -7 for y.

4(-3)-8(-7)<24

-12+56<24

44<24

3 0

4 years ago

Factor 9w+ 72 using the GCF

Alecsey [184]

Answer: 9 (w + 8)

Step-by-step explanation:

9/9 = 1

72/9 = 8

9 (w + 8)

5 0

3 years ago

Kevin is 333 years older than Daniel. Two years ago, Kevin was 444 times as old as Daniel.

astra-53 [7]

Answer:

Kevin=335.8years old

Step-by-step explanation:

K - D = 333

K - 2 = 400( D - 2 )

333 + D - 2 = 400D - 800

D - 400D = - 800 - 331

- 399D = - 1130

D = 2.8

K = 333 + 2.8

K = 335.8

8 0

3 years ago

Frank scored 75% on his spelling test with 40 questions. How many questions did he get right ?

kolbaska11 [484]

Answer:

He got 30 right!

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

(a) Find an approximation to the integral 2 (x2 − 4x) dx 0 using a Riemann sum with right endpoints and n = 8. R8 =

denpristay [2]

Answer:

Step-by-step explanation:

$\int\limits^2_0 {(x^2-4x)} \, dx$ n=8 f(x) = x² - 4x

convert [0,2] into 8 subintervals

width of each interval is

$\delta x =\frac{2-0}{8}=0.25$

All subintervals are:

[0, 0.25], [0.25, 0.5], [0.5, 0.75], [0.75, 1], [1, 1.25], [1.25, 1.5], [1.5, 1.75] and [1.75, 2]

Let, $x_i$ be the right end point of each interval i=1,..8

$x_1=0.25, x_2=0.5, x_3=0.75, x_4=1, x_5=1.25, x_6=1.5, x_7=1.75, x_8=2$

Reiman sum is

$R_8=\delta x[f(x_1)+f(x_2)+...f(8)]\\\\0.25[f(0.25)+f(0.5)+...+f(2)]\\\\0.25\times[-23.25]\\=-5.8125$

8 0

3 years ago