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xeze [42]
3 years ago
15

Lea has 14coins that have a total value of $2.30. Coins are Nichols and quarters. How many of each coin does she have. Use subst

itution.
Mathematics
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

Quarters = 8

Nickles = 6

Step-by-step explanation:

Call their numbers x and y.

The number equation is

x + y = 14

The value equation is

5x + 25y = 230

5x + 25y = 230-(5x + 5y = 70)

20y = 160

y = 8

x= 6

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Determine whether the following lines represented by the vector equations below intersect, are parallel, are skew, or are identi
KiRa [710]

Answer:

r(t) and s(t) are parallel.

Step-by-step explanation:

Given that :

the  lines represented by the vector equations are:

r(t)=⟨1−t,3+2t,−3t⟩

s(t)=⟨2t,−3−4t,3+6t⟩

The objective is to determine if the following lines represented by the vector equations below intersect, are parallel, are skew, or are identical.

NOTE:

Two lines will be parallel if \dfrac{x_1}{x_2}= \dfrac{y_1}{y_2}= \dfrac{z_1}{z_2}

here;

d_1 = (-1, \ 2, \ -3)

Thus;

r(t) = \dfrac{x-1}{-1} = \dfrac{y-3}{2}=\dfrac{z-0}{-3} = t

d_2 =(2, \ -4, \  +6)

s(t) = \dfrac{x-0}{2} = \dfrac{y+5}{-4}=\dfrac{z-3}{6} = t

∴

\dfrac{d_1}{d_2}= \dfrac{-1}{2} = \dfrac{2}{-4}= \dfrac{-3}{-6}

Hence, we can conclude that r(t) and s(t) are parallel.

6 0
3 years ago
The local video store is having a sale on video games. The store is offering a sale pack of 4 video games for $48. What is the p
Alinara [238K]
A single video game would cost $12
8 0
3 years ago
Read 2 more answers
Which fraction is greater than 3 + 1/2 - 55/8 or 7/8
Mila [183]
7/8 is ur answer because 
it can be cut into smaller parts



8 0
3 years ago
PLEASE I NEED HELP!!
Maksim231197 [3]
By 91 dollars
because 22.75 times 4 is 91
3 0
3 years ago
Read 2 more answers
Can anyone help me with this math please I will give brainlist
alexandr402 [8]

Answer:

4.5 > 4.420

0.67 < 0.8

0.82 = 0.820

62.4 > 6.24

0.13, 0.3, 0.303, 0.32

0.08, 0.8, 0.82, 8.2

24.54, 24.4, 24.304, 24.24

6.5, 6.25, 6.05, 6.007

Step-by-step explanation:

The most useful way to compare fractions is to add extra zeros at the end.

For example, 0.67 ___ 0.80.

0.80 is obviously bigger than 0.67.

In 24.4, 24.54, 24.304, 24.24, you can add extra zeros as well.

24.400, 24.540, 24.304, 24.240 (This makes it much easier to group the numbers, whether from largest to smallest or smallest to larger).

**REMEMBER TO REMOVE THOSE ZEROS AFTER FINDING YOUR FINAL ANSWER**

7 0
3 years ago
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