3 years ago

8x+9y=60 2x-9y=-30 elimation method

Mathematics

1 answer:

OLEGan [10]3 years ago

8 0

Answer:

x=3 y=4

Step-by-step explanation:

8x+9y=60 + 2x-9y=-30

10x=30

x=3

y=4

You might be interested in

What's the larger angle?

topjm [15]

Answer:

100°

Step-by-step explanation:

Since the angles om a straight line add up to 180°

10x°+8x°=180°

18x°=180°

x=10

The larger angle = 10x°

= 10(10)°

= 100°

8 0

4 years ago

Please help me with this study island question :/

siniylev [52]

Answer:

B. 56 feet

Step-by-step explanation:

One centimeter = 4 feet on the scaled drawing, perimeter of pool is 14cm. 14 x 4=56 ft.

4 0

3 years ago

Read 2 more answers

Write the inverse function for the function, ƒ(x) = x + 4. Then, find the value of ƒ -1(4). Type your answers in the box.

lesya [120]

The inverse is:

$f^{-1}(x) = x-4$

Further explanation:

Given function

$f(x) = x+4$

Step 1: Replacing f(x) with y

$y = x+4$

Step 2: Replacing x with y and y with x

$x = y+4$

Step 3: Solving the equation for y

$x = y +4\\x -4 = y+4-4\\y = x-4$

Step 4: Replacing y with f-1(x)

$f^{-1}(x) = x-4$

So, the inverse is:

$f^{-1}(x) = x-4$

Keywords: Functions, Inverse of function

Learn more about inverse of functions at:

#LearnwithBrainly

3 0

3 years ago

What percent of 160 is 56?

kakasveta [241]

160 = 100%
56 = x%

then you would cross multiply

160x = 56(100)

160x = 5600

x = $\frac{5600}{160}$

x = 35

so

35% of 160 is 56.

5 0

3 years ago

Read 2 more answers

Plzz Answer first to answer correctly will get brainliest

RoseWind [281]

Answer: 1/8

Step-by-step explanation:

Multiply by the reciprocal which would be 1/2, so 1/4x1/2 would be 1/8

3 0

3 years ago

Read 2 more answers