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Ulleksa [173]
3 years ago
14

Find an equation in slope-intercept form of the line that has slope –2 and passes through point (1,9)

Mathematics
1 answer:
lozanna [386]3 years ago
8 0

Answer:

y=-2x+11

Step-by-step explanation:

slope intercept form is y=mx+b m being the slope and b the y-intercept

using the slope you can calculate the y intercept

m=-2

y-intercept(b)=11

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Victor sold cupcakes and cookies yesterday. Each cupcake sold for $2.25 and each cookie sold for $0.50. At the end of the
lidiya [134]

answer:number of cupcakes sold is 13  Number of cookies sold is 27  

Step-by-step explanation:

Let x represent the number of cupcakes that Victor sold.  Let y represent the number of cookies that Jane sold.  Each cupcake sold for $2.25 and each cookie sold for $0.50. At the end of the day,  This mean Victor had 2.25x 0.5y = 42.75 - - - - - - - - - -1she sold 40 cupcakes and cookies combined, it means thatx y = 40Substituting x = 40 - y into equation 1, it becomes2.25(40 - y) 0.5y = 42.7590 - 2.25y 0.5y = 42.75- 2.25y 0.5y = 42.75 - 90- 1.75y = - 47.25y = - 47.35/-1.75y = 27x = 40 - yx = 40-27 = 13

3 0
3 years ago
A plant cell has a length of 0.000085 meters. Which is this length written in scientific notation?
Ivanshal [37]

Answer: The answer would be 8.5 times 10^-5

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10  If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

3 0
3 years ago
Read 2 more answers
William invested $5000 in an account that earns 3.5% interest, compounded
zvonat [6]

Answer:

Option B. $5737.62

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=4\ years\\ P=\$5,000\\ r=0.035\\n=1  

substitute

A=\$5,000(1+\frac{0.035}{1})^{1*4}  

A=\$5,000(1.035)^{4}  

A=\$5,737.62  

5 0
3 years ago
A snack company makes three batches of a nut mix using the recipe shown. Each batch contains a different total amount of mix.
stepladder [879]

Answer:

Batch 1:  3 cups cashews; Batch 2:  1/3 cup pistachios; Batch 3:  4/3 cups almonds and 2 cups cashews

Step-by-step explanation:

Let x represent the total amount of mix.

For Batch 1, we know that the amount of pistachios is 1/6 of the total and that is 1 cup; this gives us

1/6x = 1

Multiply both sides by 6:

1/6x(6) = 1(6)

x = 6

There are 6 cups total.  1/2 of the mix is cashews; this means 1/2(6) = 3 cups is cashews.

For Batch 2, we know that the amount of almonds is 1/3 of the total and that is 2/3 of a cup; this gives us

1/3x = 2/3

Multiply both sides by 3:

1/3x(3) = 2/3(3)

x = 6/3 = 2

There are 2 cups of mix total.

1/6 of the mix is pistachios; this gives us 1/6(2) = 2/6 = 1/3 cup pistachios.

For Batch 3, we know that the amount of pistachios is 1/6 of the total mix and that is 4/6 of a cup; this means

1/6x = 4/6

Multiply both sides by 6:

1/6x(6) = 4/6(6)

x = 24/6 = 4

There are 4 cups of mix total.

1/3 of the mix is almonds; this gives us 1/3(4) = 4/3 cups almonds.  

1/2 of the mix is cashews; this gives us 1/2(4) = 2 cups cashews.

8 0
4 years ago
Read 2 more answers
If a = 9 and b = 4, what is the value of 2a<br> -b?
Thepotemich [5.8K]

Answer:

14

Step-by-step explanation:

2(9)-4=14

4 0
3 years ago
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