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vladimir1956 [14]
2 years ago
13

Solve using substitution y = 5x– 1 y = 3 + 5

Mathematics
2 answers:
scZoUnD [109]2 years ago
8 0
X=9/5 y=8

Explanation in photo:

postnew [5]2 years ago
5 0

Answer:

(9/5, 8)

Step-by-step explanation:

y = 3 + 5

y=8

y = 5x– 1

8=5x– 1

9=5x

x=9/5

(9/5, 8)

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How do you solve x^2+11x+18=0 with either quadratic formula. factoring. or squarerooting
Lostsunrise [7]
I always prefer factoring, if there are simple factors.
There are simple factors here.

x² + 11x + 18 = 0

(x + 2) (x + 9) = 0

The left side is zero if either factor is zero.

First factor:
x + 2 = 0
<u>x = -2</u>

Second factor:
x + 9 = 0
<u>x = -9 </u>

 
3 0
3 years ago
Read 2 more answers
Find the sum of each series, if it exists<br>91 + 85 + 79 + … + (­29)
Natali [406]

Answer:

651.

Step-by-step explanation:

Note: In the given series it should be -29 instead of 29 because 29 cannot be a term of AP whose first term is 91 and common difference is -6.

Consider the given series is

91+85+79+...+(-29)

It is the sum of an AP. Here,

First term = 91

Common difference = 85 - 91 = -6

Last term = -29

nth term of an AP is

a_n=a+(n-1)d

where, a is first term and d is common difference.

-29=91+(n-1)(-6)

-29-91=(n-1)(-6)

\dfrac{-120}{-6}=(n-1)

20=(n-1)

n=20+1=21

Sum of AP is

Sum=\dfrac{n}{2}[\text{First term + Last term}]

Sum=\dfrac{21}{2}[91+(-29)]

Sum=\dfrac{21}{2}[62]

Sum=651

Therefore, the sum of given series is 651.

5 0
2 years ago
The condition of the car and its mileage are important variables to consider when making a decision to buy a used car.
zubka84 [21]

Answer:

True!

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Please help, thanks !​
wlad13 [49]
Act like the two triangles are one and to find z and find the others find z first comment if you didn’t understand and I will go into it with more detail
3 0
2 years ago
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Abby and Andrew are selling wrapping paper for a school fundraiser. Customers can buy rolls of plain wrapping paper and rolls of
Slav-nsk [51]

Answer:

$14 for the shiny wrapping paper

Step-by-step explanation:

6x + 4y = 104

8x + 12y = 232

x=8 y=14

4 0
3 years ago
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