Y = -12
varies directly: y = kx -> -8 = k*(2) - > k = -4
Well if they work together then one digs 5 ft and so it would be half they time so since Rob digs it in 10 hrs and Alberto digs in 8 which equals 18 divided by 2 bc they are working together it would prob take them about 9 hours
Sorry if I’m wrong … hope this helps!!
Children will use the Make a Ten strategy in this lesson, along with
other strategies. Remind children that if they are adding two numbers
such as 8 + 5, they can regroup the numbers to make adding easier. Tell
children that they can take 2 from the 5 and add the 2 to 8 to make a
ten. Also remind them that they must remember to subtract the 2 from the
5, leaving a 3, so they add 10 and 3 and get 13. Tell children that
they will use this strategy to add two-digit numbers.
Materials: overhead projector, ten-frames and
counters, tens and ones workmat, bundles of 10 craft sticks and single
sticks, large number line, and large hundred chart
Preparation: Prepare a tens and ones workmat and a
ten frame for use on the overhead. Make 9 bundles of craft sticks, 10
per bundle, using rubber bands to hold them together. Or use tens and
ones blocks. Make a large number line and hundred chart for the
classroom.
Prerequisite Skills and Concepts: Children should know the addition facts to 20 and the strategies used in learning them.
Answer:
y= 9
Step-by-step explanation:
4y-y+11=38
3y+11=38
3y= 38-11
3y= 27
y= 27/3
y=9
hope it helps ,pls mark me as brainliest
Answer:
The Surface area of the moon is 
Step-by-step explanation:
Given:
Diameter of the moon = 3.8 x 10 to the 8th
To Find :
The surface area of the moon = ?
Solution:
The moon is in the shape of of the sphere .
So the surface area of the moon = surface area of the sphere
The surface area of the sphere = 
Where r is the radius of the sphere
Radius , r = 
r = 
r = 
Now the surface area of the moon with radius r = is
=> 
=>
=>
=>
=>
