So to solve you need to set up equations, Using h as the height. So the base is 9 inches more (+9) than 3 times the height (3h) so 3h+9 equals the base. You have the area so you need to plug in the equation for the base and h for height and divide it all by 2. h(3h+9)/2=105. after you solve that and get h by itself you should get h= 7 and the b= 30

4 0

3 years ago

At a certain store, the taco sauce was on sale for 1/5 off. With a coupon for an additional 40 cents off, the final cost of the

Karo-lina-s [1.5K]

B) c - 1/5c - 40 = 120

c- (original cost) - 1/5c (sale) - 40(coupon)= 120(final cost)

Hope that helps! :)

7 0

3 years ago

Rewrite, using the distributive property 7(3z + 12) = [?]z + [|]

luda_lava [24]

Answer:

21z+84

Step-by-step explanation.

7x3=21 then put the z at the end 21z.

7x12=84. Put it after the 21z. 21z+84

3 0

2 years ago

It costs $3.45 to buy 3/4 lb of chopped walnuts. How much would it cost to purchase 12 lbs of walnuts? Enter the numeric value o

mote1985 [20]

Answer:

$55.20

Step-by-step explanation:

Create a proportion where x is the cost of 12 lbs of walnuts:

$\frac{3.45}{0.75}$ = $\frac{x}{12}$

Cross multiply and solve for x:

0.75x = 41.4

x = 55.2

So, for 12 lbs of walnuts, it will cost $55.20

8 0

3 years ago