3 years ago

Can someone please help me ASAP

Mathematics

1 answer:

BabaBlast [244]3 years ago

8 0

Answer:

A. ( -5.3 , -2.5)

Step-by-step explanation:

Given

x + y = - 7.8 ..........equation 1

y = 2x + 8.1 ............equation 2

Putting equation 2 in equation 1

x + 2x + 8.1 = - 7.8

3x = - 7.8 - 8.1

3x = - 15.9

x = -15.9 / 3

x = -5.3

Now

y = 2 * (-5.3) + 8.1

= - 10.6 + 8.1

= -2.5

You might be interested in

Convert 4/12 into a decimal round to the nearest tenths place

zimovet [89]

Answer:

0.3

Step-by-step explanation:

4 divided by 12 is .333333333… and the tenths place is right after the decimal point. ex: 5.67 with 6 being in the tenths place. since 3 can’t be rounded upto add onto the tenths place, it stays as .3.

5 0

3 years ago

Use the parabola tool to graph the quadratic function. f(x)=2x2+12x+16

yKpoI14uk [10]

We have that
f(x)=2x²+12x+16

using a graph tool
see the attached figure

7 0

4 years ago

Read 2 more answers

I need help with this I have no idea how to do it

Lapatulllka [165]

Answer:

1. 62

2. 28

3. 56

4. 92

5. 21

6. 5

7. 38

8. 28

8 0

4 years ago

68 DIVIDED BY 17 whats the answer

koban [17]

The answer will be 4

8 0

3 years ago

Read 2 more answers

Find the sum of the following series. Round to the nearest hundredth if necessary,

Aneli [31]

Answer:

$sum = \frac{a( {r}^{n - 1} )}{r - 1} \\ : but \: l = a( {r}^{n - 1} ) \\ 49152 = 3( {2}^{n - 1} ) \\ 16384 = {2}^{n - 1} \\ {2}^{n} = 32768 \\ {2}^{n} = {2}^{15} \\ n = 15 \\ \therefore \: sum = \frac{3(2 {}^{15 - 1}) }{15 - 1} \\ = \frac{49152}{14} \\ = 3510.9$

3 0

3 years ago