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earnstyle [38]
1 year ago
9

What is the area of this triangle?

Mathematics
1 answer:
yanalaym [24]1 year ago
8 0

Answer:

sum of all sides

Step-by-step explanation:

x1y2 + x3y3 + x1y1

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A teacher is choosing 4 students from a class of 30 to represent the class at a science fair. In how many ways can the teacher c
marin [14]
{30 \choose 4}=\frac{30!}{4!26!}=\frac{27\cdot28\cdot29\cdot30}{2\cdot 3\cdot4}=27\cdot7\cdot29\cdot5=27405
4 0
3 years ago
Kate decides to replace all the lights in her college apartment with energy saving light bulbs beginning this month. The packagi
tatyana61 [14]

Answer:

Kate's electric bill will be $9 for this month for bulb use only.

Step-by-step explanation:

Given:

Electricity bill lass month from bulb use = $12

Using new bulbs percent decrease in electricity = 25%

We need to find this month electric bill for bulb use.

Solution:

First we will find the reduction in bill after using new bulbs.

reduction in bill after using new bulbs can be calculated by percent decrease in electricity using new bulb multiplied by last month Electricity bill from bulb use only.

framing in equation form we get;

reduction in bill after using new bulbs = \frac{25}{100}\times 12 =\$3

Now we will find this month electric bill for bulb use only.

this month electric bill for bulb use only can be calculated by subtracting reduction in bill after using new bulbs from last month electric bill for bulb use only.

framing in equation form we get;

this month electric bill for bulb use only = \$12-\$3=\$9

Hence Kate's electric bill will be $9 for this month for bulb use only.

3 0
3 years ago
ANSWER QUICKLY! Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2
Dafna1 [17]

Answer:

y= -2/3x+490

slope: -2/3

y-intercept: 490

Step-by-step explanation:

Y-intercept form is y=mx+b, so you would first subtract 2x from both sides to get 3y= -2x+1,470. Then you divide both sides by 3, to get y= -2/3x+490. -2/3 is in the place of m, so it is the slope, and 490 is in the place of b, so it is the y-int.

3 0
3 years ago
Read 2 more answers
Can someone please help
Flura [38]

Answer:

b 120 cm

Step-by-step explanation:

6 0
3 years ago
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Which classification best describes the following system of equations x=5 y=8 -x-y+z=0
vichka [17]
What are the answer choices?

7 0
3 years ago
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