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Keith_Richards [23]
2 years ago
15

Find the values of a and b so that the solution of the linear system is (-9,1).

Mathematics
1 answer:
Diano4ka-milaya [45]2 years ago
6 0

Answer:

Step-by-step explanation:

we can write -9 instead of x and y=1 instead of 1

so we write solution again

-9a+1b=-31

-9a-1b=-41

-18a=-72

a=4

we should write 4 instead of a

-9(4)+1b=-31

-36+b=-31

b=5

a=4

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Can someone help me????
SpyIntel [72]
Lemme think bout it....no
5 0
3 years ago
Kasey and Jordan are counting calories while eating lunch in the school cafeteria. In one week, Kasey had
malfutka [58]

Answer:

Jordan got 222 calories from pizza

Step-by-step explanation:

Given:

slices of pizza ate by Kasey =10

cups of fruit salad by Kasey=  5

slices of pizza ate by Jordan = 6

cups of fruit salad by Jordan=  7

Kasey's calorie  count = 3070

Jordan calorie  count = 2522

To Find:

calories Jordan got from pizza =?

Solution:

Let the calorie of one slice of pizza be  x

and the  calorie of one cup of fruit salad be  y

According to the question, the equation that represents the Kasey's Scenario is

10x + 5y = 3070-------------------------------------(1)

Similarly the equation that represents the Jordan Scenario is

6x + 7y = 2522--------------------------------------(2)

multiply eq(1) by 6 we get

60x + 30y = 18420---------------------------------(3)

multiply eq(2) by 10 we get,

60x + 70y = 25220----------------------------------(4)

Subtracting eq (3) from (4) we get

  60x + 70y = 25220

  60x + 30y = 18420

  (-)        (-)        (-)

-----------------------------------

 0x + 40y = 6800

---------------------------------

=>40 y = 6800

=>y = \frac{6800}{40}

=> y = 170

So calorie of one cup fruit salad is = 170 calories

substituting the y values in eq 1 we get

10x + 5(170) = 3070

10x + 850 = 3070

10x = 3070 - 850

10x = 2220

x = \frac{2220}{10}

x= 222

So calorie of one pizza slice = 222 calories

Now we know that  Jordan ate 6 slices of pizza

calories  Jordan get from pizza = number of pizza he ate  X calore per pizza slice

=> 6 x 222

=>1332 calories

6 0
3 years ago
Help me please can anyone figure this out this is due soon also make sure there an explanation.
Anvisha [2.4K]

Answer:

Watch a photo!

3 0
2 years ago
What is the area of this parallelogram?
Romashka-Z-Leto [24]
A = bh = 11 x 8 = 88
answer
<span>88 m²</span>
6 0
3 years ago
Read 2 more answers
If f:X is 3x + b and ff(2) = 12, find the value of b​
Tamiku [17]

Answer:

b =6

Step-by-step explanation:

Given

f(x) =3x + b

f(2) = 12

Required

Find b

f(2) = 12 implies that:

12 = 3 * 2 + b

12 = 6 + b

Collect like terms

b = 12 - 6

b =6

5 0
3 years ago
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