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Hunter-Best [27]
3 years ago
14

Solve using elimination -3x+3y=21 -x-5y=-17

Mathematics
1 answer:
Alenkasestr [34]3 years ago
8 0

Answer:

(2,6)

Step-by-step explanation:

Google

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Amy received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.24 per pound. After buying the c
SVEN [57.7K]

Answer:

5 pounds

Step-by-step explanation:

Given that:

Amount of gift card = $80

Cost of coffee per pound = $8.24

Amount left in the card = $38.80

To find:

Number of pounds of coffee bought = ?

Solution:

Let the number of pounds of the coffee bought = x pounds

Cost of 1 pound = $8.24

Cost of x pounds = $8.24 \times x

Writing the equation as per question statement:

80 - 8.24x = 38.80\\\Rightarrow 80 - 38.80 = 8.24x\\\Rightarrow  8.24x = 41.2\\\Rightarrow x = \dfrac{41.2}{8.24}\\\Rightarrow \bold{x = 5\ pounds}

Therefore, 5 pounds of coffee was bought.

3 0
3 years ago
What is 24.7832 rounded to
Margaret [11]

Answer:

2,500 cents

I hope this helps!

4 0
3 years ago
Read 2 more answers
PLEASE HELP ME I BEG YOU!?
weeeeeb [17]
The answer to question 5 is D.5 and the answer to question 9 is (-2,-6)
3 0
3 years ago
Read 2 more answers
How do you do this?????
o-na [289]

y = 2x - 9

Step-by-step explanation:

Let's rewrite the given equation such that only y is on the left side and everything else on the right side:

3x + 6y = -30 \Rightarrow 6y = -3x - 30

Simplifying this by dividing by 6, we get

y = -\frac{1}{2}x - 5

This line has a slope of -1/2, which means that a line perpendicular to this has a slope of 2 (i.e., negative reciprocal). So we can write its equation as

y = 2x + b

This is the slope-intercept form of the equation of the line perpendicular to our given line. To complete this form, we need to find the value of b. Since this line passes through (1, -7), put these numbers into our equation to get

-7 = 2(1) + b \Rightarrow b = -9

Therefore, the slope-intercept form of the equation can be written as

y = 2x - 9

3 0
3 years ago
Which expression shows the sum 9 + 21 rewritten as a product of the GCF and a sum?
Andrej [43]
B. 
9 = 3 x 3
21 = 3 x 7
GCF = 3
3 x 3 + 3 x 7 = 9 + 21 = 30
5 0
3 years ago
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