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REY [17]
3 years ago
7

Rita paid $82 for 5 trees and 1 shrub. Lilly bought 2 trees and 1 shrub for $37. Find the cost per tree and the cost per shrub.

Mathematics
1 answer:
N76 [4]3 years ago
4 0

Answer:

trees cost $15

Shrub cost $7

Step-by-step explanation:

Given data

Rita paid $82 for 5 trees and 1 shrub

5x+y= 82---------1

Lilly bought 2 trees and 1 shrub for $37

2x+y= 37----------2

from 1

y= 82-5x

put the value of y in 2

2x+82-5x= 37

2x-5x= 37-82

-3x=-45

x= 45/3

x=$15

put the value of x in 1

5(x)+y= 82

5*15+y=82

75+y=82

y=82-75

y=$7

Hence, trees cost $15

Shrub cost $7

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3x + 4y = 10 (2nd)

--------------------add

11x = 22

So answer is B.



7 0
4 years ago
Joanna runs at an average speed of 7.5km/h. She runs 15km every day. What time did
yan [13]
Avg. speed Joanna runs: 7.5km/h
how much she runs everyday: 15km

15km/7.5= 2 hours of running time everyday

She leaves at 8:30, comes back at ?
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Joanna arrives back at 10:30a.m.
8 0
3 years ago
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The three sides of a triangle measure 60 cm, 80 cm, and I m 10 cm. What is the perimeter of
Tju [1.3M]

Answer:

250cm

Step-by-step explanation:

60cm+80cm+110cm= 250cm

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3 0
3 years ago
((Please help asap! Giving brainliest))
Ludmilka [50]

Answer:

b. y = −0.5x + 5.5

Step-by-step explanation:

Well first we need to find the slope of line CD.

To do that we'll use the following formula,

\frac{y^2-y^1}{x^2-x^1}

We'll use the points (1,1) and (3,5)

So y2 is 5 y1 is 1 so 5-1 = 4

3-1 = 2

<u>Slope = 2x</u>

If the slope of line CD is 2x we can cross out choices C and D.

Two lines that are perpendicular to each other have reciprocal slopes,

meaning is the slope of line CD is 2 then its perpendicular lines slope should be -.5.

If the perpendicular line goes through point (-1,6), the y intercept would be, 5.5.

Look at the image below ↓

<em>Thus,</em>

<em>the answer is option b. y = −0.5x + 5.5.</em>

<em>Hope this helps :)</em>

8 0
3 years ago
Sarah made a necklace using 5 times as many blue beads as white beads. She used a total of 30 beads. How many blue beads did Sar
iogann1982 [59]

Let

x-------> the numbers of blue beads

y-------> the numbers of white beads

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x=5y --------> equation 2

Substitute equation 2 in equation 1

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Find the value of x

x+y=30\\ x+5=30\\ x=30-5\\ x=25

therefore

the answer is

the numbers of blue beads is 25

7 0
4 years ago
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